这是一个真实的故事。一行四人去西藏，其中一位长者体质不太好，上路前特意给他准备了一只氧气包。途中，氧气包气嘴松了，氧气全跑了。一位同行者乘别人不注意，又悄悄吹鼓了氧气包。当走到三分之二路程时，长者才感到高原反应越来越厉害。大家急忙拿出备用的氧气包给他套上 this is a true story. A group of four went to Tibet. One of the elders was not in good physical condition. He specially prepared an oxygen bag before going on the road. On the way, the oxygen-entrained mouth was loosened and the oxygen was full. A companion passengers take no notice, but also quietly drummed the oxygen bag. When approaching two-thirds of the distance, the elderly feel that the plateau reaction is getting worse and worse. We hurriedly took out the spare oxygen bag to him