Q: Can a small incision be cleaned? A: N+3 years ago, one day, Dr. X came in a frenzy and said, “Teacher, the patient came in a hurry and asked if the small incision could be cleaned. I saw Dr. Y say to another patient, “I can’t make a clean incision!” Dr. Z also said that he had heard this to patients and families, and he saw a professor say the same thing: “It’s not easy to contour the lymph nodes with a big incision, and sometimes you have to break the ribs; how can a small incision be clean? If you don’t put your hand in, how can you do surgery?” ”That’s what I’m talking about!”