9999热视频三级毛片AV区|日韩欧美精品狼友观看视频|av在线成人免费AA片|日韩三级AV电影|久久亚洲私人国产精品vA|亚洲无码卡一卡二卡三|手机在线免费看黄色片|婷婷尹人在线婷婷五月手机网|99爱在线播放|欧美成人色情视频品

There are many students in middle school wear the glasses, and many of them were wearing the glasses since little. We have to protect our eyes, prevent them from the short-sightedness. We should keep a good sitting posture, never read the books too closely. We’d better have a short break every hour of reading, close eyes or look at the distance. We should do the eye exercises every day. In the evening, we also shouldn’t read while we are lying. And more important, we shouldn’t spend hour and hour starring at our cellphone. We all should protect our eyes.

有很多中學(xué)生都帶著眼鏡，其中很多人從很小就開始戴了。我們必須要保護(hù)我們的眼睛，預(yù)防眼睛近視。我們應(yīng)該保持良好的坐姿，看書的時候不要離太近。我們最好每看一個小時的書能短暫休息一下，閉上眼睛或者看向遠(yuǎn)方。我們應(yīng)該每天都做眼保健操。晚上的時候，我們也不要邊躺著邊看書。更重要的是，我們不要連續(xù)花幾個小時盯著手機(jī)看。我們都應(yīng)該保護(hù)我們的眼睛。