第二节书面表达（满分25分）
假定你是高中学生李建，刚接到英国朋友约翰的电子邮件（如下），现在要给他写信回复。信的篇幅在120至150词。
约翰的来信：
Dear Li Jian,
I've just happened to learn from an article that most Chinese students are suffering from poor eyesight and I am worrying whether you have things like that.Are you yourself nearsighted as well? What have you done to hurt,or protect your eyes?What would you suggest to improve the situation in general?
你的回信：
Dear John,
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