没有医疗干预，病人可能无法康复。

Without medical ___intervention, the patient might not have recovered.

他写信要求管理层介入以解决纠纷。

He wrote a letter seeking the management's ___intervention to resolve the dispute.

总统授权军事干预以稳定该地区。

The president authorized a military ___intervention to stabilize the region.