All people oer 50 are encouraged to undergo a regular colonoscopy once eery 10 years, or either a barium enema or a flexible sigmoidoscopy (with or without a yearly blood test) once eery fie years.

• 所有超过50岁的人都应该每10年进行一次常规的结肠镜检查，或者每五年做一次钡剂灌肠或者可屈性乙状结肠镜检查，每年也可做一次血液检查。