How to prevent°fro bowel cancer

According to statistics bowel cancer case in, above 35% is that in order to inheritting, the gene cause, if you of parents and someone once suffers from a rectum cancer and suggested that you had better early go to a doctor to have a check there in the middle of the brothers sister.So, how can prevent°fro?
1.Discover and cure in time the colon burning and chronic enteritis of the rectum polyp, anus crack and ulcer etc. disease, particularly delivering sex polyp more should as early as possible surgical operation excision, in order to prevent the cancer changes.
2.Notice a self-examination, once appearing then blood, diarrhea, stomachache and the bowels to become thin, the belly lump, ass fall to bulge etc. the symptom want to immediately go for a doctor, in order to early diagnose and early cure.
3.Prevent°from constipation, keep facile defecation.
4.Food diversification, not partial eclipse, don't be fastidious about food, don't the food of the long-term edible high fat high egg white, often eat to enrich the fresh vegetable and anti-cancer food of containing the vitamin.Like tomato, deep green and Cruciferae vegetable(celery, Wan Sui, cabbage, mustard plant, and turnip...etc.), soybean product, orange fruit and malt and oatmeal, spring onion, garlic, , sour milk etc..