甲上皮

例句：

1. 1. The doctor advised him to take vitamin D supplements for his health.
   医生建议他服用维生素D补充剂来保持健康。
2. 2. The patient's condition required the removal of the calcified aortic valve.
   患者的病情需要移除钙化的主动脉瓣。
3. 3. The surgeon performed an arthroscopic procedure on the patient's joint, which involved removing the damaged cartilage.
   外科医生对患者的关节进行了微创手术，包括去除受损的软骨。