我的膝盖疼痛，医生建议我去看骨科。

My knee hurts, so the doctor suggested I see an ___ortho specialist.

我的弟弟需要去看正畸医生矫正牙齿。

My little brother needs to see the ___ortho to fix his crooked teeth.

学习英语时，掌握正确的拼写规则很重要。

When learning English, it's important to master the correct ___orthography.