Caput rectum

例句：

1. 1.He was having trouble with his caputrectum.
   他患有直肠问题。
2. 2. Thedoctor advised him to have a colonoscopy to check his caput rectum.
   医生建议他做结肠镜检查以检查直肠。
3. 3. The patient had to undergosurgery to repair the damaged caputrectum.
   患者不得不接受手术来修复受损的直肠。