题目

阅读理解     Depression and suicidal thoughts have doubled in young Americans, according to a new study from the American Psychological Association.     Likely triggers? Cell phones and social media.     "More US adolescents and young adults in the late 2010s, vs the mid-2000s, experienced serious psychological distress, major depression and more attempted suicide (自杀)", says lead researcher Jean Twenge, professor of psychology at San Diego State University. "These trends are weak or non-existent among adults 26 years and over, suggesting a generational shift in mood disorders instead of an overall increase across all ages."     Twenge believes this trend is partially due to the explosion of digital culture over the past decade, which may have twisted modes of social interaction enough to affect mood disorders.     The study analyzed data from the National Survey on Drug Use and Health, which tracked drug and alcohol use and mental health issues in more than 200,000 youths aged 12 to 17 from 2005 to 2017 and almost 400,000 adults from 2008 to 2017.     Major depression in the last 12 months increased by 52 percent in kids from 2005 to 2017 and 63 percent in young adults aged 18 to 25 from 2009 to 2017. There was also a 71 percent jump in young adults experiencing serious psychological distress in the previous 30 days from 2008 to 2017.     So what's so different now? Twenge says research shows young people just aren't getting as much shuteye as they did in previous generations.     Whereas older Americans might have established more stability in their lives, sleep-disrupting social stressors are likely at their peak for teens and young adults in this digital era, she says. Older adults are also less likely to let devices interfere (干预) with sleep.     These results suggest a need for more research to understand how digital communication versus face-to-face social interaction influences mood disorders and to develop specialized interventions for younger age groups.     Her suggestion? Put your phone down at least an hour before bedtime. （1） How is Paragraph 6 developed? A . By stating facts. B . By giving examples. C . By providing statistics. D . By presenting theories. （2） What might Professor Twenge agree with? A . Mood disorders show no difference across all ages. B . Teens are less likely to let devices interfere with sleep. C . Digital cultural explosion might cause depression in teens. D . The past decade has seen a sharp decrease in teens mental disorders. （3） What do the underlined words "social stressors" in Para 8 mean? A . Interaction modes. B . Mental health issues. C . Drug and alcohol use. D . Cell phones and social media. （4） From which is the text probably taken? A . A biology textbook. B . A science magazine. C . A travel guidebook. D . A medical case. 答案： C C D B

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