提纲：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.作文地带提供例文：Peopleoftensay,"Eyesarethewindowsofsoul".Allofusunderstandtheimportanceoftheeyes.Buthowtoprotecteyesightstillremainsaquestionamongusstudents.Ifyouwanttotakecareofyoureyesight,youmustpayattentiontothefollowingpoints.Firstly,youshouldnotuseyoureyescontinuouslyforlongperiods.Afteryouhavereadforalongtime,abouttwohoursorso,youtakearestbylookingatsomethingmoredistant.Secondly,youshouldkeepyourbookaboutafootawayfromyoureyeswhenyoureadit.Youshouldalsokeepinmind:"Don'treadinadimlightorinthesun;don'treadinamovingbusorinbed."Doingeyeexercisesregularlywillhelpyoukeepgoodeyesight.Ifyoufailtokeeptheserules,youwillbecomeshort-sightedsoonerorlater.()