sphincter muscle

例句：

1. 1.The doctor advised him to exercise regularly to maintain a healthy sphincter muscle.
   医生建议他定期锻炼以保持健康的括约肌肌肉。
2. 2. During the operation, the surgeon had to work around the sphincter muscle.
   手术期间，外科医生必须绕过括约肌肌肉。
3. 3. The patient was instructed to follow a strict diet to prevent damage to his sphincter muscle.
   患者被指示遵循严格的饮食以预防对括约肌肌肉的损害。