Post-operative precautions are seen in the following aspects: 1. Complicated anastomotic fistula, abdominal bleeding, and anastomotic bleeding: need to be handled by medical personnel; 2. Malnutrition: need to choose fine food, chew slowly, and eat less and more meals; 3. Dumping syndrome: cold sweat, palpitations, and dizziness appear early after eating, and can be relieved by lying down and resting for 15-30 minutes; 4. Recurrent metastasis: need to be reviewed regularly under the guidance of the doctor; 5. Alkaline reflux anastomitis: need to take oral medication to protect the anastomosis.