April 15 to 21 this year is the 28th National Cancer Prevention and control publicity week, with the theme of "early action for cancer prevention and control". Research shows that in the etiology of human cancer, in addition to genetic, environmental and other factors, poor dietary structure and eating habits are closely related to the occurrence of cancer, among which gastric cancer, esophageal cancer, liver cancer, colorectal cancer and other cancers are directly related to diet. In order to avoid "cancer entering from the mouth", the Guangdong provincial CDC recommends doing so on a daily diet. Eat more fruits and vegetables. The dietary guidelines for Chinese residents suggest that adults should consume 300-500 grams of vegetables a day and eat a variety of vegetables, with dark vegetables accounting for at least half; You should eat 200-400 grams of fruit every day. When eating fruit, try to eat it completely instead of squeezing it into juice. The food is diverse, mainly cereals. The food is diverse, mainly cereals. Appropriately eat more coarse grains and coarse grains, and eat more fresh vegetables and fruits rich in dietary fiber and vitamins; Animal food should be moderate, not excessive intake. Control fat intake. The energy provided by total fat and oil should account for 15% - 30% of the total energy. Food with high fat content (especially animal fat) should be limited, and vegetable oil should also be appropriate (the daily intake of cooking oil for adults is 25-30g). Limit red meat intake. Excessive intake of red meat (referring to cattle, sheep, pork and their products) may be an important factor leading to colorectal cancer. It is best to choose fish, poultry and other meat for eating meat. The dietary guidelines for Chinese residents suggest that the daily intake of livestock and poultry meat is 40-75 grams. Limit salt intake. Adults should not consume more than 5 grams of salt a day from various sources, including invisible salt in food. Limit alcohol intake. Heavy drinking can increase the risk of liver cancer, rectal cancer and breast cancer. It is recommended not to drink alcohol. If not, limit it. The dietary guidelines for Chinese residents recommend that the daily intake of semen sprinkled by adult women should not exceed 15g, that of adult men should not exceed 25g, and that drinking should be prohibited for children and pregnant women. Pay attention to food storage. Food should be stored in a suitable way. The storage of cereals and beans should be moisture-proof and mildew proof, and pay attention to the prevention of mold pollution. The aflatoxin in moldy peanuts, cereals and beans is the pathogenic factor of liver cancer. Pay attention to food preparation and cooking. When cooking, the oil temperature should not be too high. The cooking methods of frying, frying, frying and fumigation should be used as little as possible, and the methods of steaming, boiling and blanching should be used as much as possible. Don't eat burnt food. Try to eat less barbecue and bacon. Do not eat salty food, eat less or do not eat pickled food, such as salted fish, pickled vegetables, pickled meat, pickled vegetables, etc. Eat less overheated drinks or food. Some people like boiled tea, hot pot, etc. in fact, the esophageal mucosa is very delicate. Overheated food is easy to scratch the esophageal mucosa. For a long time, it may lead to the proliferation or canceration of esophageal epithelial mucosa. In view of the complexity of carcinogenic factors, in addition to diet, as well as genetic, environmental and other factors, Guangdong CDC suggests that we should be vigilant against 11 cancer risk signals. 1. An abnormal mass in a superficial part of the body. 2. Black moles and warts on the body surface deepen or increase rapidly in a short time. 3. Abnormal feeling of the body: choking, pain, etc. 4. A prolonged ulcer of the skin or mucous membrane. 5. Persistent dyspepsia and anorexia. 6. Change of stool habit and character or blood. 7. Persistent hoarseness, dry cough and blood in sputum. 8. Abnormal hearing, nosebleed, headache. 　 9. Abnormal vaginal bleeding, especially contact bleeding. 10. Painless hematuria, poor urination. 11. Unexplained fever, fatigue and progressive weight loss. (Xinhua News Agency)