1. Pear can promote fluid production, moisten dryness, clear away heat and resolve phlegm, and was often used by ancient doctors for esophageal cancer, cardiac cancer and gastric cancer. Pear is suitable for patients with nasopharyngeal carcinoma, laryngeal carcinoma and lung cancer, because carotene, vitamin B2 and vitamin C contained in pear have certain anti-cancer effects. 2. Anthocyanins and resveratrol contained in grapes, especially grape skins, are natural antioxidants and also have the effect of inhibiting cancer, which can inhibit the malignant transformation of cancer cells and destroy the replication ability of leukemia cells. 3. There is a very useful ingredient in apples-polyphenols, which can inhibit the proliferation of cancer cells. Researchers found that apple polyphenols can reduce the incidence of colon cancer. After mice were transplanted with cancer cells, eating apple polyphenol aqueous solution had a better anticancer effect in terms of survival rate and quality of life. 4. Strawberries play the first role in anti-cancer fruits. Fresh strawberries contain a wonderful tannic acid substance, which can produce anti-toxic effect in the body and prevent the formation of cancer cells. In addition, there is an amine in strawberry, which can also play a good role in preventing leukemia, aplastic anemia and other blood diseases. Kiwi is rich in vitamins, especially vitamin C is 4- 12 times that of oranges, 30 times that of apples and 60 times that of grapes. Recent studies have confirmed that kiwifruit contains an active substance, which can block the generation of nitrosamines for cancer treatment in human body, so it has a good anti-cancer effect. 6. Citrus fruits Orange, orange, lemon, grapefruit and other citrus fruits are rich in bioflavonoids, which can enhance the activity of some enzymes in human skin, lungs, gastrointestinal tract and liver, help transform fat-soluble carcinogens into water, and make them difficult to be absorbed and excreted. At the same time, they can enhance the body's ability to absorb vitamin C, an important anticancer substance. Vitamin C can enhance immunity, prevent the formation of nitrosamines, a strong carcinogen, and play a certain role in the prevention and treatment of digestive tract cancer.