After the surgery, the average energy intake was 802.8 Kcal on the first day and gradually increased to 1389.3 kcal on the seventh day; the amount of protein, lipid, and carbohydrates on the first day's diet was 35.8g, 28g, and 78.3g respectively, and 72.3g, 49.2g, 180.2g on the seventh day.