核心问题就是两个因素：
1，资源问题，就是铺位无法满足需求
2，成本问题，旅客不愿意支付更多额外的费用
假如运力充足，旅客也愿意付钱，
完全可以以包厢为单位购票，你的问题都解决了
【 在 greattreenet (greattree) 的大作中提到: 】
: 因为找不到敏感关键词，只能翻译成英文了。
: Now university dormitories are generally divided into male and female dormitories. There is a clear distinction. However, in the sleeper compartment of the train, Strange men and women can sleep in the same room. Although they generally don’t take o
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