My dear friend
I am grateful to you for your help on March 26th as I had been sick and went to see the Doctor in a hurry. Then, I forgot to leave my child at home without any attendance and luckily you came forward to help. Thank you.
參考: Partly according to ” The Advanced Learner's Dictionary of Current English with Chinese Translation ” published by Hong Kong Oxford University Press in 1975
In 26/3 because I was sick, so I went to see the doctor, But I forgot to take care of my child. XX,Thank you for taking care of my child during that time.