阅读理解（二）
阅读下面短文，根据短文内容回答问题。
Smartphone, Poor Sight
As we all know, smartphones make our lives easier, so we can find people around us always busy on them. But have you ever thought about what they mean to our eyes?
According to a survey, many people have become near-sighted（近视）because they spend too much time on the screens. When we look at something far away, our eyes blink（眨眼）about 15 times every minute. But when we look at things closer to the face, our eyes get drier because the blinkings slow down. Another bad habit is using smartphones in dark rooms before going to sleep. Bright screens can hurt our eyes and even cause more serious eye illness.
So use your smartphones wisely, and start to protect your eyes before it’s too late!
Hold the phone at least 30cm away from your eyes when using it.
Don’t forget to blink your eyes often before they get dry.
Keep the light on when you use smartphones at night.
Take a break at least every thirty minutes and look at something far away. Then try to look at the top of your nose and repeat this several times.
Why do many people use smartphones?
_______________________________________________________________________________
When do your eyes get drier?
_______________________________________________________________________________
Is it good to look at bright screens in dark rooms? Why or why not?
_______________________________________________________________________________
How often should you take a break while using smartphones?
_______________________________________________________________________________
What do you usually do to protect your eyes when using smartphones? (One way is OK.)
_______________________________________________________________________________