Ansa cervicalis

例句：

1. 1. The patient was diagnosed with Ansa cervicalis and required surgery.
   患者被诊断出患有颈椎前凸，需要手术治疗。
2. 2. The doctor explained the causes of Ansa cervicalis and recommended exercises to improve posture.
   医生解释了颈椎前凸的原因，并建议进行一些改善姿势的锻炼。
3. 3. The patient's condition worsened after undergoing surgery, requiring further treatment.
   患者在手术后病情恶化，需要进一步治疗。