写作思路： 　　1.首先确定这是一篇描述地方的说明文. 　　2.确定写作要点：根据所给信息,大体可以分为三个部分——城市简介,可以按照地理位置、自然环境、城市面貌和变化发展这样的逻辑顺序写,接下来写你看到的问题,最后写你的一些看法和建议. 　　3.各层次之间注意使用恰当的连词,让过渡自然,结构合理.比如：however,inmyopinion等. 　　DearBob, 　　It’sverykindofyoutowritemeandletmeknowaboutourbeautifulcity.NowI’dliketotellyousomethingaboutmyhometownJiangcheng. 　　ThecitystandsonthebankoftheChangjiangriver.Itisabeautifulplaceforpeopletolivein.Itseconomyhasbeendevelopingrapidlyinthepasttenyears.Newfactories,houses,androadshavebeenbuilt.Moreschoolsandhospitalsareavailableforitspeople.However,therearestillsomeproblems,suchaswaterandairpollutionandheavytrafficinrushhours.Inmyopinion,Jiangchengshoulddevelopitseconomyscientifically.Iwouldalsothinkthatthegrowthofitspopulationshouldbebroughtundercontrolsothatwe’llhaveabetterhometowninfuture. 　　Yours, 　　Xiaohua