I. Maintenance of the environment 1. Keep the environment clean, no flowers or bonsai indoors. Garbage with cover. 2.Avoid contact with people suffering from colds, chicken pox, measles, shingles, etc. with infectious nature. 3.Reduce access to public places, and wear a mask in a crowded environment. 4.If there are white blood cells less than 3.0*10^9/L in the treatment, you should put on the mask by yourself; if the white blood cells are less than 1.0*10^9/L, then all people such as patients and caregivers should put on the mask. 5. Avoid contact with pets and their excrement. (2) Maintenance of body hygiene 1. Mouth and nose: 1) Check daily whether the nasal cavity is red, and whether the mouth has red spots, ulcers or white floating skin. (2) Every 2-4 hours, rinse the mouth with edible salt water or medicated mouthwash (Koutai or sodium bicarbonate). 3）Please clean the mouth with a soft-bristled toothbrush or cotton swab immediately after eating. 2. Skin 1) Make a habit of washing hands at all times. (2) Bathe often, trim your nails, and keep them clean. (3) Observe the skin or injection site for redness and swelling. 4）Use knives, scissors and other sharp objects carefully to avoid injury. (3) Perineum and anus (1) Wipe clean with toilet paper from front to back after using the toilet (do not wipe back and forth), then wash with water, and keep the perineum, anus and genitals clean and dry at all times. 2）Keep your bowels and urine open, and inform your health care provider if you have constipation or diarrhea. (3) Avoid using enemas, rectal suppositories or measuring anal temperature when leukocytes are less than 1.0*10^9/L. (3) Diet allocation 1. Eat foods high in protein and rich in vitamins. 2.If there is no edema and the need for water restriction, it is best to drink more than 3000 ml of water per day. 3.If the white blood cell is less than 1.0*10^9/L, please do not eat raw vegetables and fruits. If you have any of the following symptoms, you should inform the medical staff immediately: 1. Fever with axillary temperature over 37.5°C. 2. Chills or chills. 3.Cough, runny nose or sore throat. 4.There is a burning sensation in the urine. 5.Poor bowel movement more than twice a day. 6.Redness, swelling, pain or burning sensation in the perineum, genitals or anus. 7.Redness, swelling, pain or burning sensation on the skin or injection site.