在这文中应该没有延伸含义,就是指按钮罢了,那按钮可能会亮起警示灯或铃声好让主人公知道,然后马上服务客人或病人.
如果是push the panic button,就是指惊慌失措.用法如：Stay calm; there's no need to hit the panic button. 冷静,无需恐慌.
"push the button"也可以指开始行动的意思,如:
We are waiting for him to push the button so that we can start the rescue operation. 我们正期待着他发好司令,好让我们马上采取救援行动.