亚洲欧洲av一区二区久久,亚洲乱亚洲乱妇22p,亚洲av成人片色在线观看,亚洲av无码成人精品区在线播放,亚洲av无一区二区三区

How to Protect Our Eyes
Eyeryone knows that eyes are one of the most important parts of our body.Having good eyesight means we can not only see things clearly,but also enjoy some beautiful scenes.there is also a saying going that eyes are the window of our mind.But how can we protect our eyes?
　　Here are some tips for you .Fistly, it is a good habits not to read your books or newspapers for a long time because our eyes need rest,too.Secondly,don't read books in a strong or poor light,otherwise,the light would harm our eyes.At last,remember to keep on doing eye-exercises and watch more green grass and other plants.