apex of patella

例句：

1. 1. The doctor examined the knee and found that the apex of the patella was dislocated.
   医生检查了膝盖，发现髌骨顶点脱臼了。
2. 2. During exercise, it's important to maintain proper form to avoid injuries at the apex of the patella.
   运动时，保持正确的姿势可以避免髌骨顶点受伤。
3. 3. The patient had to undergo surgery to repair the apex of the patella.
   患者不得不接受手术来修复髌骨顶点。