1)眼睛是心灵的窗口。

　　2)学会如何保护眼睛。

　　思路分析：从题目的要求看，本篇作文要求写成说明文。重点要放在如何保护眼睛上。例如：不要看书时间太长，眼睛与书的距离要适当，走路坐车时不要看书，要常做眼保健操等。如何保护眼睛这个问题比较好写，因为考生有这方面的知识和体验。

　　例文：

　　People often say, "Eyes are the windows of soul". All of us understand the importance of the eyes. But how to protect eyesight still remains a question among us students.

　　If you want to take care of your eyesight, you must pay attention to the following points. Firstly, you should not use your eyes continuously for long periods. After you have read for a long time, about two hours or so, you take a rest by looking at something more distant. Secondly, you should keep your book about a foot away from your eyes when you read it. You should also keep in mind: "Don't read in a dim light or in the sun; don't read in a moving bus or in bed." Doing eye exercises regularly will help you keep good eyesight.

　　If you fail to keep these rules, you will become short-sighted sooner or later.

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