模板一：
Dear XXX,
I am writing this to express my sincere gratitude to your kindness.It is very nice of you to pay a visit when I stayed in hospital,I felt warm and relieved when I saw you.I attribute my quick recovery to your care.I wish to keep our friendship forever!
Thanks again and take care!
Yours,
XX
模板二：
Dear Zhangxuan:
I am writing this letter to thank. First, I must thank the god, for letting me meet with you, my best friend throughout my life. And then, thank you very much for staying with me all the time.
From the time we know each other, every time when I meet with troubles, you always try your best to help me. When I am sad or unhappy, you always comfort me to make me forget the sad things. And you usually share your good and happy experiences with me……All these make me delighted. Although you are in Tianjin now, I believe we still stay together.
Because of you, I feel the life is wonderful. Meeting with you is really a good thing. At last, I have only a sentence want to say——My dear friend, thank you.
Sincerely,
Linluo
模板三:
Dear Friends,
I am writing this letter to thank you for you warm hospitality accorded to me during my recent visit to Beijing. I would also like to thank you for your interesting discussion with me which I have found very informative and useful.
During the entire visit, I was overwhelmed by the enthusiasm expressed by you. I sincerely hope we could have more exchanges.
I am looking forward to your early visit to my hometown when I will be able to pay back some of the hospitality I received during my memorable stay in beautiful Beijing. With kind personal regards.
Faithfully yours.