Nutritional Risk Screening Nutritional Support Gastrointestinal Cancer

The goal of this clinical trial was to compare the effects of different nutritional support methods based on nutritional risk screening on postoperative nutritional status in patients with gastrointestinal tumors.The main question it aims to answer is that different types of nutrition can improve the nutritional status of patients with different nutritional status;Long-term dietary interventions for patients with poor nutrition can make cancer patients better able to tolerate surgery and chemotherapy and improve their quality of life.The intervention group received nutrition + exercise + psychological intervention upon admission, routine parenteral and enteral nutrition support after operation, and continued nutrition + exercise + psychological intervention after discharge.The control group received routine parenteral nutrition support in the department after surgery, and the patients and their families were given diet education during hospitalization.