给美国人写信应该注意什么细节,内容要注意什么?

　　一些起码的文章规则,以及写封面需注意的一些事项.
　　Dear XXX,
　　（每段都不用空格…“齐头式”）来几句寒暄一下,how are you going these days …I am good,…（不一定要这一段,看情况）
　　(另起一段)写你想说的东西……Next week,I am going to ……
　　（…………讲完想说的了………………）
　　说些祝福话,或者是I am looking forward to hearing from you.Best wishes.
　　Yours sincerely,(程度不同,选不同的词)
　　（你的名字）
　　(打印的话,在这里签个名,不然就忽略这一行)
　　（这百度奇奇怪怪的,对不齐啊,后面三行稍微对齐靠右.）
　　Dear Zhang Li,
　　I'm sending you this short letter of thanks with a small present,which I hope you will like.Thank you very much for helping my father last Sunday,when he broke his legs on the stairs.
　　My father told me that he had fallen and hurt his leg badly.He could not get up or walk.Then you came to help him.You called a taxi for my father,and took him to the nearest hospital.When the doctor told you my father s leg was broken,you phoned me and told me what had happened.My father is already much better now.He will have to stay in hospital for another week,and then he can come home.
　　Once again,my parents and I want to express our gratitude for all you have done for our family.You are such a warm-hearted student.
　　Best wishes.
　　Yours truly,
　　MaHui
　　（网上找的一篇文章）
P.S.：可以在网上搜一搜英文书信的资料…