我问一英语问题啊in the hospital和at the hospital和in hospital有什么区别呀还有i

英语 in hospital.和in the hospital 有什么区别 区别in the hospital 和at hospital in hospital 和 in the hospital 有什么区别吖? in the hospital 和at the hospital ,in hospital,at hospital的区别 in hospital 和 at hospital 的区别 in hospital 和in the hospital in hospital,in the hospital,和 in a hospital? in hospital和in the hospital 还有in bed 和in the bed的区别 spend in hospital和spend in the hospital 有什么区别? stay in hospital和 in the hospital区别 in the hospital 和 in hospital的区别 in hospital和in the hospital的区别