Today is your birthday. Every year on this day, you will receive a gift from your parents in the countryside. This afternoon, you receive the gift, but you don't sign the sender. However, you have a good idea. This year, they may neglect to write the sender's address. As usual, a letter from your parents is attached to the gift. What do you think is the content of the letter?
A. For example, do you have any good friends? And so on, letters concerning the life of your children
B. Be sure to pay more attention to your physical integrity and the health of your children
C. Sometimes I come back to show my face and so on, looking forward to the letter from my children