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    Smartphone ,poor sight
    Look around and you’ll see people busy on their smartphones. Smartphones do make our lives easier . But have you ever thought about what they mean to you eyes?
    According to a study ,half of British people own smartphones and they spend an average of two hours a day using them . There has been a 35% increase in the number of people in the UK who suffer from shortsightedness since smartphones were introduced there in 1997.
    Staring at smartphones for long time gives you dry eyes. When looking at something in the distance ,your eyes automatically blink a certain number of times. However ,when you look at things closer  to your face ,the blinking slows down . This reduces the amount of tears and causes discomfort in your eyes. Another bad habit is using  smartphones in dark rooms before going to sleep . If you look at a bright screen while your pupils become larger ,too much light enters your eyes. This can do harm to the eyes and cause a disease called glaucoma.
    While you’re probably not going to stop using to your smartphone,there are a few things you can do to protect your eyes. Hold  your phone at least 30 continues away from your eyes when using it. Take a break every hour and try the following :look at something at least five meters from you and then focus on the tip of your nose. Repeat this several times. It should reduce the discomfort in your eyes.

    小题1:B
    小题2:C
    小题3:D
    小题4:A
    小题5:D

    试题分析：短文大意：本文主要介绍了使用智能手机的危害，告诉我长时间使用手机会引起眼睛干涩和青光眼。并建议我们连续使用手机不超过一个小时。
    小题1:主旨大意题。根据短文标题Smartphone ,poor sight及下文描述，可知这篇短文主要讲述的是智能手机对我们眼睛的伤害。故选B。
    小题2:细节理解题。根据There has been a 35% increase in the number of people in the UK who suffer from shortsightedness since smartphones were introduced there in 1997.描述，可知自从1977年以来越来越多的英国人收到了手机的危害。故选C。
    小题3:细节理解题。根据Staring at smartphones for long time gives you dry eyes. 及下文This can do harm to the eyes and cause a disease called glaucoma.描述，可知使用智能手机只要是能引起眼睛干涩和青光眼。故选D。
    小题4:细节理解题。根据短文最后一段Take a break every hour and try the following 描述，可知一生建议我们，每使用手机1小时就休息一下。故选A，使用手机不要不休息地超过一个小时。
    小题5:主旨大意题。阅读短文可知本文主要介绍了使用智能手机的危害，并向人们介绍了如何恰当使用手机的建议。故选D。
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