医生建议他在手术后服用抗凝剂以防止血栓形成。

The doctor advised him to take ___anticoagulants after surgery to prevent blood clots.

为了防止血块形成，医生给他开了抗凝血药。

The doctor prescribed ___anticoagulants to prevent blood clots from forming.

医生给她开了抗凝血剂以防止血栓形成。

The doctor prescribed ___anticoagulants to prevent blood clots.