Dear xx,
Your delightful present,某某礼物,reched me 某某时间 and I must thank you very much indeed for it. It was awfully kind of you to think of me. You could not have chosen anything else that would have given me more pleasure. I put it to use right away, and have already had some pleasant time out of it.
Once again, many thanks.
yours xxx
Date: day Month Year
Dear xxx,
Thank you very much for your gift xxx. I like it very much.
...... (根据不同的礼物有不同的用途,可以说明一下对你的用处,在此只告诉你一种感谢信的格式!)
I hope we could keep in touch in the future and look forward to hear from you! Thanks again.
Take care of yourself (or Good health, or Best Regards)!
Yours sincerely,
xxx