a rescuer根据提示信息可推断所缺内容应为有关主语职业的。文中第一句就点明："Larry Smith is one of the rescuers"，故此处应填"a rescuer"。

Larry Smith is one of the rescuers on the Golden Gate Bridge. His job is to save people who attempt to jump into the sea. If the telephone rings at three in the morning, he knows it’s trouble. Someone is threatening to commit suicide. Larry will get his things ready and in no time he will be out of the door heading to the spot. Many suicide attempts are made on the spur of the moment and lives can be saved. But if you fail, if the per son jumps into the bottom of the fog, there’s no describing how helpless you feel. Often would-be jumpers are driven to despair and see no hope of getting out of their misery. The trick is to open a channel of communication with them. Following are some tricks that have worked. "Hey, if you’re going to jump, at least give me your mum’s phone number. So I can call and tell her." "That’s a nice watch. If you’re going to jump, can I have it?" Sometimes all it takes is the voice of the human being you cares. Larry estimates he has rescued 38 people in his ten years of service.