1．首段——开门见山，直入主题
英语书信的特点是开门见山，用简洁的语言引出文章的主题，使读者清楚文章要说什么。
①I'm writing to tell you that my uncle Li Ming is going to your city for a conference, and I've asked him to bring you the Chinese painting you've asked for before.
②I'd like to ask you to write an article for our school's English newspaper.
