血管曲张

例句：

1. 1. He developed varicose veins after years of sitting at a desk.
   他长时间坐在办公桌前后患上了静脉瓣膜功能不全。
2. 2. The doctor advised him to exercise regularly to prevent venous insufficiency.
   医生建议他定期锻炼以防止静脉功能不全。
3. 3. The patient was referred for surgery to treat his varicose veins.
   患者被推荐接受手术以治疗他的静脉曲张。