矿上医生每天巡诊。
The doctors at the mine make their rounds of visits every day.
他们向人们询问事情究竟是怎么回事，发现最大的问题是医生们在晚上巡诊，但是病人什么时间都有。
They asked people what was going on, and it turned out that the big problem was that the doctors did their rounds in the evening, but patients were admitted at all time.
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