视疲劳引起的视力下降,经过适当休息即可恢复。如果是近视引起的视力下降,不可能恢复。因此一定要积极主动提前预防近视的发生和发展,避免近视引起的视力下降。

　　It is important for everyone to keep good eyesight. But do you know how to protect your eyesight?First, don't keep your eyes working for a long time. You'd better have a rest by looking in the long distance after you have studied an hour or so.www.yyzuowen.com

　　Second, pay attention to the following: Don't read in the sun or in a poor light; don't read in bed or in a moving bus. And when you read you should keep the book away from your eyes for about a foot.And third, do eye-exercises every day. It will also help you keep good eyesight.

　　If you obey the rules above, I think, you may prevent your eyesight from becoming short-sighted.

编辑:Liuxuepaper.Com

作文地带知识拓展:

• 保护，拼音是bǎo hù，指尽自己的努力照顾，保卫一个人，使他的身体或心理不受到伤害。

  保护英文释义：

  v.protect; defend; guard; safeguard; preserve

  n.protection; defence; aegis; preservation