Today, it should have been a day for my esteemed teacher to impart knowledge and answer questions. Yet, I don't know what has happened, but he seems so enraged!,However, Dr. Li did not remove the needle but instead replaced it with a new blood bag......fifty milliliters, one hundred milliliters,...five hundred milliliters.,Obviously, three-and-a-half-year-old Xiaoning still doesn't know what the heart represents.。