Morethannineoutof10youngpeopleexposethemselvestotheblue...

問題詳情：

More than nine out of 10 young people expose themselves to the blue light from smartphones before bed, causing problems with sleep. A new survey also shows more than 28 million people in the UK regularly get no more than seven hours sleep a night. Prof Richard Wiseman, who commissioned the YouGov poll described the findings as "extremely worrying". Of the 2,149 adults questioned, 78% said they used electronic devices before going to bed. This rose to 91% among the 18 to 24-year-olds questioned in the survey.

Getting less than seven hours sleep a night is below the recommended guidelines, and is associated with a range of problems, including an increased risk of weight gain, heart attacks, diabetes and cancer. "The blue light from these devices suppresses（壓制）the production of the sleep-inducing hormone melatonin, so it's important to avoid them before bed time," said Prof Richard Wiseman, from the University of Hertfordshire.

Everyone needs different amounts of sleep, but adults are generally thought to require a minimum of seven to eight hours a night. Teenagers are recommended to get more, about nine hours. The proportion（比例）of people thought to be getting too little sleep had risen by a fifth since a "bedroom poll" conducted last year by the National Sleep Foundation.

Last week revealed opticians were warning that overuse of smartphones may be increasing people's risk of eye damage. Optician Andy Hepworth said: "Blue violet light is potentially harmful to the back of your eyes. "So over a long period of time it can damage your eyes. When you're looking at a smart phone, the light peaking out of that is blue violet. The news came as a survey of 2,000 people suggests under-25s check their phones 32 times a day.

24. The purpose of the passage is to ________________________.

A. stress that people don’t use smartphones.

B. remind people of enough sleep.

C. ask people not sleep too much.

D. tell people not to use smartphones before bed

25. Which of the following statements is TURE according to the passage?

A. According to a new survey, more than 28 million people in the UK get more than seven hours sleep a night. 

B. More than 90% young people expose themselves to the blue light from smart phones before bed.

C. Of the 2,149 adults questioned, 91% said they used electronic devices before going to bed.

D. The news came as a survey of 2,000 people suggests under-25s check their phones 30 times a day.

26. According to what Andy Hepworth said, overuse of smartphones may be increasing people's risk of __________.

A. weight gain     B. cancer      C. eye damage     D. heart attacks

27. Teenagers are generally thought to get sleep of _________ a night.

A t 9 hours    B. 7-8 hours   C. less than 7 hours  D. more than 10 hours

【回答】

DBCA

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