【答案解析】Dear Steven,
I"m writing to express my thanks for your treat. Last weekend, I spent the most wonderful days in your house. Thank you very much for your wonderful hospitality. Every moment was pleasure to me.
I"d like to tell you again how much I enjoyed the weekend in your hometown. Everything was perfect: the weather, the food and the beautiful surroundings. In particular, all your family members were very friendly to me, which made me feel at home.
I want to thank you again for offering me such a memorable weekend. Hope you can give me the chance to reciprocate your kindness when you visit Beijing someday.