1, drink more water. Water can regulate body temperature, help digestion and absorption, transport nutrients, prevent and improve? constipation. Postoperative bedridden patients should drink more water, at least 3,000 to 4,000 ml (c.c) a day, which can dilute the concentration of fluid and can dilute the blood to prevent blood clots from occurring. 2. Prevent osteoporosis. Patients should consume more foods rich in vitamin D, because vitamin D is important in the body to help bone calcification and promote calcium? It plays a very important role in the body to help calcify the bones and promote the use of calcium. Foods rich in vitamin D include: egg yolk, milk, animal liver (such as pig liver, beef liver), cod liver oil, etc. In addition, sunlight can activate the vitamin D in the skin, so exposure to sunlight from time to time is also a good way to get vitamin D. 3, in order to accelerate wound healing, increase resistance to infectious diseases, you can consume more vitamin C-rich foods, such as fruits, dark green and yellow-red vegetables, such as guava, citrus, lemon, tomatoes, etc. 4, elderly patients and bedridden patients calcium loss, should be supplemented by food. Milk is the main source of calcium; other calcium-rich foods include: dried fish, shrimp, egg yolk, soybeans and their products (?). such as bean juice, bean skin, five spice dried beans), dark green vegetables, purple cabbage, black sesame, white sesame, yeast powder, etc. 5, after surgery or injury (such as fractures) protein? loss is accelerated, should choose more high raw? value protein foods, such as milk (skim or low-fat milk), eggs, lean meat, fish, poultry (skinless), etc. to supplement nutrition. Vegetarians can choose soybeans and their products to supplement plant-based protein.