Proximate the capsule of the sphincter with 4 interrupted sutures of 2-O or 3-O Vicryl suture making sure the sutures do not penetrate the rectal mucosa.

• 用2-0或3-0铬制或可吸收缝线缝合肛门括约肌肌束，确保缝线不要穿透直肠粘膜。