colonoscopy

例句：

1. 1. He underwent a colonoscopy to detect any abnormalities in his large intestine.
   他接受了结肠镜检查以检测他的大肠是否有异常。
2. 2. The doctor recommended that he undergo a colonoscopy to screen for colon cancer.
   医生建议他接受结肠镜检查以筛查结肠癌。
3. 3. After the procedure, the patient was advised to undergo a follow-up colonoscopy within six months.
   手术之后，患者被建议在六个月内进行复查结肠镜检查。