Dear best friend, I am truly grateful for your attentive care of the child during this period. Your love and patience have moved me immensely.
Every time I think of you playing with my child and tutoring homework, I feel particularly at ease and warm. It's great to have friends like you!
The smile and growth of a child cannot be separated from your efforts. I will always remember this kindness in my heart, and whenever you need it in the future, I will do my best.