Dear Editor:

I am a teacher, my name is Liming. As a teacher, I have more chances to meet students,
and I find it quite ordinary for students with short-sighted. For example, there are 45
students in my class ,but about 15 people are short-sighted. It really make me worried.
And it seems that the ratio is becoming higher.
Some bad behavior will cause people short-sighted, such as reading while walking, taking
bus but watching a book or reading in bed, but which happens between students exactly.
So I want to advocate to the student that, eye is the window of the heart, we have no reason
to hurt it. We should learn to take good care of our eyes, and form a good habit of reading.

Yours,
Li Ming
水平不高，旨在练自己的英语,希望高手修改下