Generally depends on the patient's state of consciousness. Some patients with poor postoperative consciousness are fasting water. It is necessary to judge whether there is stress digestive tract ulcer according to the patient's consciousness and recovery of defecation. Some heavier patients were given nasal feeding at an early stage. At any time, the diet plan is generally to drink water-liquid food (after liquid food, the patient's gastrointestinal tract will partially recover, which is what we call defecation and exhaust, and if there is abdominal distension, continue to fast)-semi-liquid food-general food. Smaller hospitals do not have a nutrition department, so they can follow the above simple weight loss method to achieve specific and balanced nutrition. As mentioned above, some hospitals have nutrition departments for reference.