in a hospital ; in hospital ;at hospital的区别

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inahospital;inhospital;athospital的区别inahospital;inhospital;athospital的区别inahospital;inhospital;athos

in a hospital ; in hospital ;at hospital的区别
in a hospital ; in hospital ;at hospital的区别

in a hospital ; in hospital ;at hospital的区别
in a hospital,在某个医院
in hospital,住院
at hospital,在医院工作