【正确答案】[参考范文]
Dear Mr. Chen,
[1]first of all, please accept my wholehearted gratitude. [2] It’s very kind of you to send me immediately to the hospital the other day when I was knocked down by a taxi.
I learned your name and address from a doctor who happened to know you. You are [3] such a great man that you help others without letting them know who you are. [4]I am really appreciated it. [5]By the way, these days, my condition has been obviously improved due to the careful treatment of the doctors and nurses. My doctor told me that I’ll be discharged from hospital in two weeks. I hope that I can say “Thanks” to you personally.
[6] Again, special thanks for all you did for me.
Yours respectfully,
Li Ming

【答案解析】[思路点拨] 第一段表明写信的目的——感谢对方把自己及时送到医院；第二段具体表达自己的感激之情，并告知对方自己现在的情况；第三段再次表达感谢。