他腿上的伤口需要缝针。

The cut on his leg required ___stitches.

伤口愈合后，医生拆了线。

The doctor removed the ___stitches after the wound had healed.

如果没有缝针，这么深的伤口无法正确愈合。

Without ___stitches, the deep wound would not have closed properly.