题目

阅读理解 Internet Time Tied to Teen Depression(抑郁) Symptoms     Spending time online is normal behaviour for teenagers. But too much Internet use by teens —or too little, for that matter —might be related to depression, a new study finds.     The findings, reported in the journal of Pediatrics, do not mean that the Internet is to blame. For one, teens in the study who spent no time online were also at increased risk of depression symptoms. Instead, the researchers say that both heavy Internet use, and non-use, could serve as signals that a teenager is having a hard time.     For the study, Dr Pierre-Andre Michaud and his colleagues at the University of Lausanne, Switzerland, surveyed 7,200 individuals aged 16 to 20 about their Internet use.     Those who were online more than two hours per day were considered "heavy" Internet users, while those online anywhere from several times per week to two hours per day were considered "regular" users.     The teenagers also answered a number of health-related questions, including some standard questions about "depressive tendencies" that gauge (判定) how often a person feels sad or hopeless. Compared with regular Internet users, the study found, kids who were heavy users or non-users were more likely to be depressed or very depressed.     Among male teens, heavy users and non-users were both around one-third more likely to have a high depression score, compared to "regular" users. Among girls, heavy Internet users had an 86 percent greater chance of depression, while non-users had a 46 percent greater likelihood compared to regular users.     That was with factors like family income and any chronic health problems taken into account. Since teenagers typically go online to contact friends, the researchers guess that those who are never online may be more socially isolated. （1） What's the purpose of Dr Michaud and his colleagues' study? A . To know the actual number of teenagers online. B . To know the actual time of teenagers online. C . To know the influence of study online on teenagers. D . To know the relationship between the Internet use and depression. （2） How long are those who are online per day considered "heavy" Internet users? A . More than two hours. B . More than eight hours. C . More than twelve hours. D . More than ten hours. （3） According to the accounts of the sixth paragraph, what can we conclude? A . Non-users of Internet aren't likely to be depressed. B . Among girls, heavy Internet users are more likely to suffer depression than regular users. C . Heavy users will lead to death unless limited. D . Non-users have more possibility to be depressed than heavy users. （4） What's the meaning of the underlined word "isolated" in the last paragraph? A . Independent B . United C . Separated. D . Capable. 答案： D A B C

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