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Elephant Reserve Country: Thailand     This is a working vacation at a wildlife centre. Anyone can become a volunteer if he/she agrees to help the elephant keepers with tasks. Daily tasks     Gather the elephants at 6:30 am. Take them to look for food in the forest. Clean the enclosure(围场). Swim with the elephants in the lake in the afternoon. If volunteers want to relax after work, they can watch satellite television. How this vacation helps     If these elephants hadn't been rescued, they would still be living on the streets of Bangkok. The rural environment is much better for them than the urban environment where there is lots of pollution. Your Comment     "I love working with these huge gentle animals."

Gorilla safari(观赏野兽的旅行) Countries: Kenya, Rwanda and Uganda Departures(出发): 2—3 departures per month from Aug. to Dec. Extras: permit ￡220     If you're lucky, you'll see lions, elephants and rhinos during this safari. The highlight(最好的部分) of the trip is the opportunity to see gorillas in the mountain forests. However, you must be in good health — if a gorilla caught a cold, it would be extremely harmful to its whole family. How this vacation helps     There are only about 600 gorillas left in the world as human activity has reduced the area where they can live. When you buy a permit, this will pay for the protection of the national park. Your comment     "I'll surely go back as soon as I have enough money!"

Polar bear watching Area & Country: Arctic, Canada Departures: sixty trips between Oct. 1—Nov.19.     Every October and November groups of polar bears gather in Hudson Bay. As they are normally lonely creatures, this is unusual. The bears wait for the ocean to freeze so that they can hunt for seals, so this is the perfect opportunity to see them. Extra activities include dog sledding(狗拉雪橇) and a night trip to see the Northern Lights. How this vacation helps     If the Arctic ice cap melts due to global warming, polar bears will be in danger. We give a share of our profits(利益) to the charity that protects polar bears. Your comment     "These terrible bears get all the liquid they need from their food."

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    Even if you've never been to Phoenix, you know this about the place It's hot. From June to September, the temperature can easily surpass the century mark. But that doesn't stop hikers from attempting the 1.3-mile hiking to the top of the city's famed Camelback Mountain. Signs warn that the trail is "extremely difficult". If you continue, a posted checklist suggests at least a liter of water per person. And if you're still not stopped, another sign farther up declares: "If you're halfway through your water, turn around!"

    Unfortunately, many people to not take the warnings seriously. Fortunate y, Scott Cullymore does. The 53-year-old Cullymore can be found hiking up and down Camelback a couple of times a day, giving out cold bottles of water to worn-out hikers. He has helped hydrate so many hikers that he has earned a heavenly nickname: the Water Angel.

    Cullymore was on Camelback Mountain one day in 2015 when a British tourist died after being lost for nearly six hours in the July heat. That experience inspired him to start helping people caught unaware by the cruelty of Mother Nature. "They underestimate the mountain, and they overestimate what they can do, and they get themselves in trouble." he warned.

    One hiker who was offered water agrees. "You think you know the heat, but then you get out here in the desert and it surrounds you like a blanket," said Austin Hill, who was hiking with a high school friend. They were lucky, he said pointing to Cullymore. "We ran into this Good Samaritan here." And with that, the Water Angel goes in search of another hiker in need.

Choose the one that fits best according to the information given in the passage you have just read.

    A family in Edinburgh has discovered that an old chess piece they kept in a drawer for 55 years is a long-lost part of a medieval(中世纪 )chess set. The piece was bought by their grandfather for £5 from an antique dealer in Edinburgh in 1964. It is estimated that it could now sell for £ 1 million at auction(拍卖). It is one of five missing pieces from the Lewis Chessmen, a set of medieval chess pieces that were found in a sand hill on the Isle of Lewis, off Scotland's west coast, in 1831.

    The piece is 8.8 centimeters tall and made from walrus ivory, a rare material in those days. It is warder, which is a prison guard, with a helmet, shield and sword. This piece would be the same as a rook(车), or castle in a modern chess set.

    The family, who don't want to make their name public, explained how their grandfather was unaware of the piece's importance when he bought it in 1964. After he died, it was looked after by his daughter, who believed that it had magical qualities. They finally realized how important the piece was when it was examined by Alexander Kader, an expert at Sotheby's auction house in London.

    The Lewis Chessmen are famous all over the world. The set is split between the National Museum of Scotland in Edinburgh, and the British Museum in London, attracting lots of visitors. They are thought to have been made in Trondheim, Norway, between AD 1150 and 1200, and were probably buried on Lewis for safekeeping on their way to being sold in Ireland. Nobody really knows for sure why they were buried there or how they were discovered.

    The piece will go on display in Edinburgh and then London before its auction on 2 July. It is expected to either be bought by, or loaned to, a museum. Kader says there are still four missing pieces out there, "However, it might take another 150 years for one to show up."

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    On a sunny, spring day, a group of children, four to seven years old, sit on their bicycles. They wear helmets to protect their heads and gloves to protect their hands. Their mothers, standing nearby, watch them closely. The children are ready to learn how to ride. Rachel Varn still remembers how she felt riding a bicycle for the first time. She says, "It is probably the biggest confidence booster (提升). It gives kids such a sense of independence and self-guidance." Now, her job is helping children experience that moment.

    Rachel Varn left her job of selling bicycles to become a trainer for bicycle riding last year. She founded Pedal Power Kids to teach bicycle education. Before starting a ride she teaches the children how to make sure the bicycles are in good condition for safe use. She calls it " the ABC quick check." "A" is for air. she explains, "We have to check out tires before we ride. "B" is for brakes. We want to make sure our brakes work before we find ourselves at the top of a hill about to go down. And "C" is for chain." She says the chain must be clean.

    The rest of the training is more fun. The children learn riding skills, from balance and pedaling to turning, starting and stopping. And they learn to keep their eyes up and look ahead while riding. Varn says many children struggle to do this. They look down at the pedals instead. She adds, " Obviously that doesn't allow them to see what's going on around them, and it doesn't allow them to turn properly either." Varn says watching where you are going helps you turn easier.

    Learning to ride a bicycle can open a whole new world to children. It gives them a sense of accomplishment and freedom. They become more sensitive to their surroundings and better able to make safe, smart decisions going from one place to another. Varn's goal is to get more children on two wheels. She says," That's really a great way for kids to be active and develop healthy habits. It helps reduce pollution and just keep families and communities connected."

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    I was sitting in an airport when a woman behind me asked, "What's the best gift you've ever got?" I closed the magazine I'd paid too much for and listened for an answer. "You mean like, the best birthday present?" a young man said, "Probably the gold coin I got for graduation."

    I threw my magazine onto a neighboring chair and thought about the question. What's the best gift I've ever got? Good health aside, when it comes to material objects, for me the answer is easy. It was a high school graduation present, gift-wrapped and hand-delivered by my grandfather. He handed it to me and said, "Stay close to the land. Don't be afraid to dig in and get a little dirt on you."

    That fall, I went off to college and that shiny new green-handled spade with the silver blade (刀刃) hung untouched on the wall in my parents' garage. A few years later, I had my own family and that graduation spade made its way from my folks5 garage into my own. I dug gardens, planted trees, roses and bushes. The spade was nothing but a tool.

    The years rolled by. The spade has lost some of its color and I've added some gray, but I still dig hard into the earth, more often than ever. It's more than a trusted workout partner. It's a reminder of my family, one proudly rooted in agriculture. It's a useful tool with a memorable message about staying close to the earth. Priceless!

    A few months from now, my daughter will finish graduate school, and she has already had a job waiting in another city. She's knowledge-rich but cash-poor, and though she's expecting nothing from me, I have something valuable to give her before she moves away. It'll be wrapped of course, and it'll be worth the weight in gold.

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    Working well in a team requires full cooperation. It's an important skill for almost every employee to have. Your ability to do your job is dependent upon others getting your work done, and others depend on you to get their work done.

    Communicate well. Lack of communication is one of the biggest reasons of a team's failure. Seek input from team members so they feel like a valuable part of the team. Communication establishes trust among team members. In addition, communicating well can help prevent and resolve conflict. Meet regularly to keep members involved in and aware of your work progress. Post decisions where everyone in the team can see them.

    Be flexible. In teamwork, priorities and responsibility can change instantly. Stay ready to shift focus. Training team members to be able to do parts of other team members' jobs can be a valuable part of teamwork; being flexible helps to build appreciation for all the parts of the team.

    Meet deadlines. Work hard to ensure you meet established deadlines when you work in a team environment. Others are depending on your work. Negotiate timelines with your teammates at the start of a project. Doing so allows you to have a say in how work gets accomplished.

    Establish accountability. All team members must be responsible for the success and failure of the project. Although every team doesn't need a leader, teams require a formal way to ensure everybody does his part. Try using meetings to report on progress.

    Celebrate accomplishments and encourage the team. Senior executives may not always recognize the importance of some team members' work. Share congratulations at team meetings and talk about whose work is invaluable in helping you get your work done.

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    In 2008, someone, or perhaps a group of people, using the name Satoshi Nakamoto published a paper to an online group that discussed cryptography(密码使用法). That paper described a process that would use cryptography to create a secure electronic cash system, now known as a cryptocurrency(加密货币). Person to person payment could be made online using a shared network of computers instead of a bank or other financial institution. Each deal could happen very quickly. The shared network of computers would also serve as the means to prove those deals safely. Getting rid of the need for a centralized banking system would open up the possibility for anyone to become part of the digital economy.

    Today, there are well over a thousand different cryptocurrencies. Most are still trying to be feasible global payment system like Bitcoin. They are held back by problems affecting the entire cryptocurrency industry.

    One issue is weak security on cryptocurrency websites where users either store their electronic cash in virtual "wallets" or exchange one kind of electronic cash for another. In recent years, clever thieves have broken into many of these websites and stolen electronic cash. The websites are struggling to protect their users from such thefts.

    Another problem is the large number of fake cryptocurrencies that are advertised on the internet. The advertisements invite internet users to visit websites offering new cryptocurrencies. Many visitors are persuaded by the websites to buy their cryptocurrencies using actual money. Later, the webistes disappear along with the victims' money. In response to this problem, companies like Facebook and Google are limiting cryptocurrency advertising on their websites.

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    When Sarah Wishnia received an iPad from her daughter, "It was like Greek to me." Max Rosenblum showed her how to socialize on Facebook and shop on Amazon with her new device. With Max's help, Elena learned to give orders to Sin, Mike familiarized himself with Waze and Honey began searching for information about movies, restaurants and books on her smartphone. Max is 16, a rising junior in Davie. His students are residents of Coral Gables, fascinated by technology and eager to learn about this brave new frontier. Max began offering his tech coaching for seniors a year ago, after he helped his grandmother with her iPhone and iPad. He taught her how to text and use Facebook. He also downloaded a Scrabble app for her to play. "She loved it," he said, not without a trace of pride.

    That experience inspired him and his parents, Adam and Heather. They reached out to a connection at Coral Gables and launched a website, techmaxed.com. He also recruited (招募) other teens to teach the one-on-one lessons in Coral Gables. These youths go to the retirement communities at least once a month. Though teaching a class might appear to be more expedient, soon Max found out that group sessions simply didn't work. "People are at different levels, and it was hard to teach that way," he said. "It's much better to give them individual help." "Most people come more than once," he added. "I have my regulars."

    "First he showed me how to get my email on the phone," Rosen, 88, said, "and then he wrote up a short step-by-step guide for me so I could remember." Max admits that teaching older adults takes time, but he figures he's also paying it forward.

    "Maybe when I'm 87 and there's new technology," he said, "somebody will teach me, too."

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One of the most efficient ways to achieve peace and speed up economies (经济) is to provide girls with better education and more rights. Today, girls' lack of access (进入) to basic education is getting more serious when it comes to the use of digital (数码的) technology, leaving them far behind boys. And because the world is even more digital, those who lack basic internet skills will find it increasingly more difficult to take part in the formal economy, to get a quality education, and to have their voices heard.

Since 2013 the global gender gap (性别差异) in male and female access to the Internet has actually increased from 11 to 12 percent. Worse yet, women and girls living in the poorest countries are 31 percent less likely than men and boys to have access to the Internet. In developing countries, some 200 million fewer women than men own a mobile phone, the most common means of Internet access there. This digital divide is increasing, and should it continue at the present pace, it is projected that over 75 percent of women and girls will lack Internet access and digital skills.

There are many causes of the digital gender gap. They include girls' exclusion (排斥) from basic education, from specific technology education and high costs of mobile phones and Internet access.

Indeed, one of the so-called reasons why girls may be discouraged from learning how to access and use digital technology is also a groundless one—that girls are simply not good at using technology.

Without the help of the government, most of the benefits of technological change will be enjoyed only by men, exacerbating gender inequality.

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When people want to know about the weather, they usually go to their radios, TVs, newspapers, or to the Internet. However, you can also find many weather signs among wildlife, because of their highly developed senses. Drops in air pressure(压力) produce an effect on small animals in many ways. Mice and deer are good weather indicators. People who spend a lot of time outdoors have observed that, before a storm, field mice come out of their holes and run around. Deer leave high ground and come down from the mountains.

Birds are especially good weather indicators because they also show the effect of a pressure drop in many ways. For example, some birds become irritable(急躁的) and quarrelsome and will fight over a piece of bread. Other birds chirp(叽叽喳喳) and sing just before a storm. It seems they know they won't get another chance for an hour or two. Birds also seek safe places before a storm. You will sometimes see birds settling in trees or gathering together on a wire close to a building. Pre-storm low pressure makes the air so thin that birds have difficulty flying.

It is unusual to see many birds flying overhead in the summertime, rather than during the periods in the spring or autumn. Watch for other weather signs if you see this. If they fly in the wrong direction, they may be flying ahead of a storm.

By paying closer attention to some important signs in nature, we can become better prepared for any kind of weather.

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We all need to eat, and when we go to buy food at the supermarket, we're offered many choice. But we often buy food that's been produced in huge amounts and that's traveled many miles before it ends up on our plate. So for some, growing their own food is a better choice – and it tastes good too!

From growing vegetables in little pots on your balcony to taking care of a small plot of land, there are many ways to produce home-grown food. It can be backbreaking work digging, weeding and watering the soil, but the result is fresh, home-grown fruits and vegetables, helping us keep a 'five-a-day' diet.

The recent Covid-19 pandemic lock-down means demand for homegrown food has seen a comeback in the UK. Miriam Dobson from the University of Sheffield, told the BBC that some people have been spending a lot of their time on their plots, growing plenty of fresh fruit and vegetables – which, at times, have been challenging to buy in supermarkets. She says "Coronavirus has reminded people of the weakness within our global food system. In such a difficult time, interest in self-support rises."

But for those with limited space, a solution to grow your own vegetables lies closer to home – using pots. Sheila Brand lives in a third-floor flat in Rotterdam. She has managed to grow tomatoes and eggplants and is already harvesting raspberries. She told the BBC watching the plants grow "is very exciting: 'Oh it's got a new leaf!' "

As well as the benefits of saving money and enjoying tasty food, growing your own from a balcony or window ledge not only improves your well-being and immediate environment, you can actually grow a lot of vegetables. So, maybe it's time for us all to get planting and develop our green fingers!

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TikTok is a fun, silly place. To scroll through(浏览)it is to take in a fantastic amount of people dancing and lip-syncing(对口型). There's a video of Cameron Diaz s wine drinking challenge, a very polite kid named Grey, and a clip from Taylor Swift's "Love Story" that you'll hear way too much. It's addictive and ridiculous.

But the platform has been in the news lately for reasons relating to privacy and security. What you're hearing in the news may force you to wonder if the app is safe to use? The short answer is that it's probably completely fine for most people to be on TikTok, as long as they keep in mind that, just as with other social media apps, it hoovers up data.

Platforms like TikTok and Instagram collect personal information from users with different levels of transparency(透明度), points out Shuman Ghosemajumder, an internet security company. The first level is information that you're clearly aware you're sharing with them. This includes the email or account you used to sign up for the app, and of course the content you actively share on the platform.

The next level is data you may not be aware an app is collecting—such as details like your IP address and information about your device and its operating system. TikTok says in its privacy policy that it is also "scanning and analyzing" the messages you send over the platform.

Finally, the third category of data collection is the criminal kind which experts search carefully apps to find. But Ghosemajumder says it's extremely difficult for an app like TikTok to hide that. Has TikTok done that? Ghosemajumder says he knows of no evidence that it has.

Let common sense be your guide if you're using an app like TikTok. If you don't want thousands of people to watch you dancing in your living room with your family, then don't upload a video that shows just that. Ultimately, Ghosemajumder doesn't see much daylight between TikTok and its competitors. "There's no fundamental difference in using TikTok versus using Instagram," Ghosemajumder reflects.

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March, April and May are months full of festivals and events all over the world. Here are some wonderful festivals around the world that happen in spring.

SongKran--Thailand

Dates: 13^th-15th, April

In Thailand, it's time to celebrate the coming monsoon season, which will bring the rain many people have been looking forward to. They celebrate it with a festival called Songkran, when people head out to the streets with water guns to spray(喷，洒）everyone who walks past. If you walk on the streets where the festival is celebrated, prepare to get soaked!

Naghol--Vanuatu

Dates: Every Saturday from April to May

Every year, villagers come together to celebrate the harvest of yams, an important part in the peopls's diet in Vanuatu. The festival is most famous for its "land diving ceremony". During the ceremony men and boys dive to the ground from high wooden towers with only two thin vines attached(附于)to their ankles(脚踝）. The divers' heads have to lightly touch the ground when they jump—something very dangerous if the vines are not measured（测量）properly.

Cherry Blossom Viewing —Japan

Dates: The cherry blossom season is different from year to year depending on the weather forecast.

 The cherry blossom season has huge importance to the people of Japan, who celebrate the days when the flowers finally blossom. Only a few days later, the petals(花瓣) fall to the ground, like pink snowflakes. This is one of the most beautiful things to see. In Japan, almost everyone has picnics in the parks to view the flowers.

Sinhalese New Year--Sri Lanka

Dates: 13^th or 14^th, April

Just like in many other countries in South an South East Asia, this is the time when the Sinhalese celebrate the traditional New Year, an ancient celebration which marks the end of the harvest season and is one of two times of the year when the sun is straight above Sri Lanka. There are a lot of delicious foods during the celebration.

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At the beginning of the 20th century there were more than a million lions worldwide. Today there are less than 30,000 in the wild. The remaining lions are increasingly threatened by habitat loss, hunting activities to protect farms and cattle.

For generations, Masai tribesmen on the large African plains in southeastern Kenya have hunted lions-to protect their farms and cattle. Today they celebrate the lions' life. Noah is an elder in the Masai community. "We have decided as a community of the Masai to lay down our spears, and there will be no more killing of lions in our community." He is part of a group of Masai visiting the United States promoting (推广) the Predator (捕食性动物) Compensation Program.

Conservation International's Frank Hawkins explains，"The Masai have been living with wildlife for many generations and it has been a conflicting relationship in many ways. They compete with the animals for food as lions eat their cattle. We're trying to find ways in which the wildlife will become something useful to them." They had the Predator Compensation Fund founded in 2003. After much discussion, a group of Masai farmers agreed to protect lions. In turn, if lions or other predators kill their cattle, the Masai owner will be paid market value for the dead animals from the fund.

One man said that in the past, when a lion killed cattle, they killed it on the spot. And now, after the start of the program, the Masai see the lion population growing. Since 2003. only four lions have been killed here.

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Counseling（咨询）Services

Counseling Services is a place on campus where you can find someone to talk when you're feeling hopeless, lonely, depressed, confused, upset over a relationship, or just anxious. If you or anyone you know has been disturbed by recent events, please come to Counseling Services，which can provide a safe and comfortable environment for all students.

Service Time

Counseling Services will be closed from Monday. December 21st 2020 through the beginning of Spring Term 2021. But we will continue to provide Tele-health services by phone and email Monday through Friday from 8:00. AM to 4:30 PM. We will be fully closed on the following dates: December 24th. 25th. 30th. 31st. January 1st. 2021.

Appointment

To make an appointment, call （715） S36-552I during our business hours: Monday-Friday 8:00 AM-12:00 PM. 1:00 PM to 4:30 PM. We are open 8:00. AM to 6:00 PM on Wednesdays.

What You Can Get

In addition to services on phones or on line, you can now check out our Attacking. Anxiety and Depression Workshop Videos, or see what our office is up to on Instagram and Facebook. We have also been collecting COVID-19 specific online resources.

If you want to know more, please click here.

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When researching New Year's resolutions in the 1980s, the psychologist John Norcross found over 50% of Americans made resolution. After 6 months, only 40% had stuck with it. Two years later, the number had dropped to 19%. Still, we keep telling ourselves we can lose weight, save money, and go to the gym.

It turns out that timing is important in determining whether we succeed. In May, 2012, the behavioral economist Katherine Milkman, at a social-science gathering, found herself in a discussion about "turning points". She said, "I had a strong instinct that turning points are effective - moments that feel like a new beginning."

So she teamed up with two colleagues, Jason Riis and Hengchen Dai, to see if the "turning points" idea held any merit. In follow-up studies, they found fresh starts do push us to change our behavior. With those, researchers suspect, comes a sense of optimism, the promise of "a new me," as Milkman put it. To test that theory, her team looked at daily Google searches for the term "diet" over 9 years, finding a predictable cycle: they topped at the start of any given week, month, or year, then gradually declined. The largest increase — 82% above the baseline — occurred immediately after New Year's.

The college gym attendance is no exception: shooting up in January and decreasing in the following months. Smaller spikes occurred at the beginning of each week, each month, and each term.

Finally, the researchers investigated commitments on the website stick, which allows you to set a goal and contractually determine the consequences for failing to attain it. Tracking 43,000 people over 2.5 years, they found the greatest number of contracts were signed at the start of the new year. Throughout the year, each week and each month had a mini-cycle of its own, with the beginning of the week corresponding to a 63% increase. "Every week brings a new opportunity," Riis says. "And people take advantage of that, whether or not they know it."

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Misery by Stephen King (1987)

On my first tour at 23, I bought Misery for one of countless flights. I found myself onstage thinking, occasionally, "This is an enjoyable and exciting experience, but I can't wait to get back to the hotel to read the next chapter." The film doesn't do justice to the original suspense (悬念) of King's novel. It made me a reader for life.

The Day After Tomorrow by Allan Folsom (2008)

All of Folsom's novels are worth your time, but his first, which is totally unrelated to the movie of the same name, is the most entertaining work of fiction I know. You're attracted from the first chapter, taken on a ride of action and passion right to the last jaw-dropping sentence.

As a Man Thinketh by James Allen (1903)

I've gifted this to countless friends. A century before Rhonda Byrne's The Secret came this brilliant exposition of how thoughts influence quality of life. It's a life-changing 64 pages. I always keep it in my bag when I travel and on my nightstand at home. I consider it my Bible (圣经).

America's Reluctant Prince by Steven Gillon (2019)

This bio (自传), written by a longtime friend of John F. Kennedy Jr., was a great companion during my tour in 2019. As someone with thorough knowledge of and deep affection for his subject, Gillon skillfully walks the line between exposure and respect.

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For all those who agree with Neil Gaiman's motto in American Gods that "a town isn't a town without a bookstore," what might be the perfect holiday choice has just been listed on Airbnb: the chance to become a bookseller for a week or two.

For the total cost of ￡150 a week, guests at The Open Book in Wigtown, Scotland's national book town, will be expected to sell books for 40 hours a week while living in the flat above the shop. Given training in bookselling from Wigtown's community of booksellers, they will also have the chance to put their "own stamp" on the store while they're there. "The Open Book's aim is to celebrate bookshops, encourage education in running independent bookshops and welcome people around the world to Scotland's national book town," says the Airbnb listing.

The Open Book is leased (出租) by the Wigtown Book Festival from a local family. Organisers have been letting paying volunteers run the shop for a week or two at a time, and opened the experience up to the world at large.

"I wouldn't call it a working holiday," said Adrian Turpin, director of the Wigtown Book Festival. "It's not about cheap labour (体力劳动) — it's about offering people an experience." The money is "just necessary to cover our costs," said Turpin, admitting that "it can be a hard life, selling books in a small town, so it's not a holiday for everybody. "

"I think the shop would have closed, without this," he said. "So part of the idea was to get new people in — people who would hopefully end up having a good time and a long-standing relationship with the town. "

The idea comes at a difficult moment for independent booksellers. In 2005, there were 1,535 independent bookshops in the UK, with the number dropping to 939 by 2014.

So far, The Open Book has been leased around 10 times, with guests including those from The Bookshop Band, a librarian from Portland, a Dutch government employee, and an 80-year-old couple.

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There have been a lot of reports recently surrounding 5G, the next generation of wireless technology for the world. But what is this technology and how might it change our lives?

5G stands for fifth generation, meaning the next step in the development of technology to replace the current 4G system. 4G was the replacement for 3G, which came after 2G, and so on. Earlier "G" systems were designed to improve mobile communication operations. Each new technology brought major improvements in speed and greatly increa sed network capacity（容量）. The new 5G system promises more of the same. However, technology experts say there is a major way that 5G is different than the earlier systems. It will move well beyond mobile network technology to affect many more devices and industries than other "G" versions.

Wireless industry groups say 5G will help fuel future "smart cities" by connecting sensor（传感器）networks. 5G is also expected to connect self-driving cars and support new technologies involving virtual reality. Higher 5G speeds could also permit doctors to commonly perform remote medical operations. Factories and businesses could use 5G technology to increase automation and improve the collection of information.

Every coin has two sides. Much of the data could contain private details about individuals, businesses or government organizations. The increased data flow would give internet attackers a lot more possibilities to steal and misuse data. In addition, the wider use of a 5G wireless network means any breakdown of the system would have more widespread and severe results. Such difficulties could affect public safety as well as world economic activity.

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No. It's a simple word, but it can be so difficult to say. Whether it's a favor asked by a friend, or even an unethical request from a colleague, many people will say "yes" because they hate to let others down and saying "no" makes them feel uncomfortable.

And we worry that saying no will change the way the other person views us. If you have a reputation of being a helpful and accommodating person, it is even harder to say no because you don't want to hurt that good reputation, says Adam Grant, a professor at The Wharton School of the University of Pennsylvania.

"Every 'no' is a missed opportunity to make a difference and build a relationship," Grant wrote in a column for The Huffington Post.

Saying no is a rejection and a lot of times it does hurt feelings. But even so, psychologists say, most people probably won't take our "no" as badly as we think they will. That's because of something called a "harshness bias (严重性偏向心理)" —our tendency to believe others will judge us more severely than they actually do. For those people pleasers, Grant says there's a big difference between pleasing people and helping them. "Being a giver is not about saying yes to all of the people all of the time to all of the requests. It's about saying yes to some of the people (generous givers who will return your favor, but not necessarily the selfish takers) some of the time (when it won't compromise your own goals and ambitions) to some of requests (when you have resources or skills that are uniquely relevant)."

Always saying yes can make us overcommitted and put us under too much pressure. Saying no helps us protect our own priorities, psychologist Judith Sills told The Wall Street Journal. Another important reason to say no, Sills says, is it keeps us from giving in to peer pressure. "To have your own values, sometimes you have to say A 'no' to people with whom you don't agree," Sills says.