Patient: “My father, 77 years old, was diagnosed with colorectal cancer … in the United States in early July this year. On July 11, he had surgery, and the doctor said, “The back half of the large intestine with cancer was removed, there was no metastasis of lymph, it was adenocarcinoma of the large intestine, and the cancer cells invaded the fatty tissue through the intestinal wall.” He came home on July 17, and was admitted to the emergency room on the 25th because of vomiting and belly pain, and the doctor drew out one bottle of greenish liquid and one bottle of redish liquid from his nostril twice. Please tell Dr. Cui what to do in this case. Do I have to undergo chemotherapy? Cui Fenghui, Department of Anorectal Surgery, Zhejiang Tongde Hospital: First of all, we need to strengthen nutrition and not to avoid eating too much. However, if you can only eat liquid, then you need intravenous nutrition. If the body is poor, it is impossible to withstand the blow of chemotherapy. If the body recovers well, it is estimated that it can be tolerated and still should be chemotherapy.