书面表达（满分25分）
近几年中小学生近视人数大幅增加，据报道多达30%—50%的中小学生戴眼镜，而且这一数字还在呈上升趋势。保护视力必须得到广泛重视。
你作为一名学生，请根据自身体会用英语写一篇有关保护视力的短文。词数100词左右，短文的标题和开头已经给出。内容要点如下：
1、综述中小学生的视力现状。
2、分析造成学生近视的主要原因。
3、介绍视力保护的简便方法。
Take Good Care of Eyes
In recent years more and more school students have become near-sighted...
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________