主要内容：告知病愈并答谢探望，告知已恢复正常生活，使其放心

虽然字数不够，但是很地道，希望大家能从中摘录有用的词句。

Dear Mr. Ho,

I am happy to report that I have fully recovered from my recent surgery and returned to my normal work schedule yesterday.

Thank you  for the concern you showed by taking the troubel to wish me well while I was convalascing. It was the encouragement I received from friends like you that helped speed my recovery. Your thoughts really meant a great to me.

I look forward to thanking you again personally, and maybe enjoying a few drinks together at an early date.

Yours sincerely,

Frank Cheng