2 . A new study has found that social media could be affecting the sleep of young adults. The study is a project of researchers at the University of Pittsburgh’s School of Medicine.They found that young people who often use social media are more likely to suffer from sleep disorders than those who use social media less. The researchers say doctors should ask young adults about their use of social media when treating sleep problems.“This is one of the first piece of evidence that social media use really can affect your sleep,” said Jessica C. Levenson, the lead author of a report on the study. The researchers set out to examine the connection between social media and sleep among young adults.The researchers wanted to find out how often young people used social media sites like Facebook. For the study, they gave questionnaires to nearly 1,800 adults, aged 19 to 32. On average, members of the study group used social media sites one hour a day. They also visited various social media accounts 30 times per week.Thirty percent of the study’s participants(参与者)reported having serious problems with sleeping. Those people who used social media a lot were three times more likely to have a sleep disorder. And those who spent the most time on social media were twice as likely to suffer from sleep problems.Researchers say social media can influence sleep in a number of ways. People can lose sleep by staying up too late looking at social media. Sensitive issues argued about on social media can cause excitement. Using an electronic device can disturb a body’s natural sleep rhythms because of the light coming from screens. The researchers note that in some cases, young adults who have a hard time sleeping may use social media to help them fall asleep, which may in turn lead to more problems sleeping because social media involve screen time that is interesting and can keep you awake.【小题1】What do the researchers suggest on a doctor’s treating young adults’ sleep problems?A．Knowing their living environment.B．Asking about the time they spent on social mediaC．Asking what social media sites they use.D．Inquiring about their sleeping habits.【小题2】What can we know about the study?A．Less than one-third of the participants in the study have problem sleeping.B．Doctors don’t think there is any way to cure sleeping problems caused by social media use.C．Social media use has something to do with young adults’ sleeping problems.D．Participants who like using Facebook are less likely to suffer from sleeping problems.【小题3】Social media use affects one’s sleep in the following ways except that ________.A．one will stay up lateB．one can get excited.C．one’s sleep rhythms will be disturbedD．one can fall fast asleep【小题4】What is the main idea of the passage?A．Social media have affected young adults’ sleep.B．How to deal with sleep problems.C．Social media takes up so much time.D．Sleep problems mainly result from social media.【小题5】The main purpose of the passage is to ________.A．informB．encourageC．persuadeD．advise