我举个例子
A：Tom is a selfish man.
B: Stop talking!!He is behind you.
A:Why don't you tell me earlier? That was so embarrassing.
I need first aid. 我需要急救。
紧急情况，你受伤了，你就可以说了
例句：Help, Help...My leg is badly hurt.I need first aid.
相关词汇：
人工呼吸 artificial respiration
急救车 ambulance
急救箱 first-aid kit
急救站 first-aid station
急救措施 emergency treatment
胸外心脏按压 extrathoracic compression
处理伤口 dressing wounds
晕倒 fall in a faint
休克 shock