Dear Andrew, 

Thank you very much for your concern. 

Last month, several places in Beijing were blanketed with thick yellow fog. Everything around disappeared from our sight. Some highways were closed. Traffic jams were commonly seen in the streets. Many people especially children and senior citizens found it difficult to breathe. As a result, local hospitals were crowded with people who had problems with their noses and lungs. Part of the cause was the dry weather but the severely damaged environment contributed a lot to this nightmare.

Personally, I didn’t get any health problems in the haze because I stayed mostly indoors. But to make a significant change, we really have to do more to protect our environment. To live a better life, we have to push on with economy, but it wound be meaningless if we have to achieve it at the cost of our breathing air.

Yours,

Li Hua

题目分析：本书面表达是一篇提纲作文。提纲作文写作的时候注意以下几点：1、仔细阅读有关提示，弄清试题提供的所有信息，明确有哪些要点。2、提纲是文章的总体框架，要在提纲的范围内进行分析、构思和想象。要依据提示情景或词语，按照一定逻辑关系来写。3、根据要表达的内容确定句子的时态、语态；语言表达要符合英语习惯。

【亮点说明】文中使用了非常好的短语和句子为文章增色不少，比如be blanketed with，As a result，be crowded with，What’s more, at the cost of；运用who引导的定语从句。并注意了句子的衔接如：but，because，if，before等等。