登山者非常感激那位把他从雪崩中救出来的救援者。

The climber was deeply grateful to the ___rescuer who saved him from the avalanche.

那位志愿者成为了灾区人民的重要救助者，提供了食物和医疗援助。

The volunteer became a key ___rescuer for the disaster victims, providing food and medical aid.