It might be fun to use your smartphone, but be careful. Too much screen time may be harmful to your health.
First, it is bad for your eyes. A researcher called Sarah Hinkley says the problem comes from the blue light that the screen gives out. Looking at a smartphone for a long time can cause eye strain (眼疲劳), headaches and dry eyes. So it is a good idea to take a break every 15 minutes when you are working at a computer or using a smartphone.
Second, screen use can do harm to children’s brains. A new study shows that using screens too much can affect how children’s brains grow. If children use screens for more than one hour a day, they might have lower levels of white matter in their brains. White matter is key to the development of language and reading skills. So it is wise to cut down the tie of children using all kinds of screens.
Third, using screens too much will influence your sleep. According to a study, about 95% of the people between the ages of 13 and 64 use electronics before bed; especially the young people under 20. Doctors say that the light from those electronics at night may make you excited before you go to bed. Then it’s hard for you to get enough sleep. So you’d better turn off smartphones, TVs, and all other screens an hour before your bedtime.
To keep healthy, doctors and researchers strongly advise that you shouldn’t use screens for long hours.
【小题1】The blue light from your screens can cause ________.A.eye strain | B.headaches |
C.dry eyes | D.all of the above |
A.take a break every 15 minutes | B.have lower levels of white matter |
C.use screens too much before bedtime | D.are the people from 13 to 64 |
A.![]() | B.![]() | C.![]() | D.![]() |
A.The ways to keep healthy. | B.The harm of using screens too much. |
C.The ways to use screens. | D.The advantages of using screens. |