It's thoughtful of you to check my luggage!
你还帮我检查行李真是想得太周到了！
It's thoughtful of you to give me a ride.
你愿意载我一程这是太体贴周到了！
It's thoughtful of you to bring so much food to me!
你给我带来这么多吃的真是想得太周到了！