in hospital和in the hospital的区别?

in the hospital 和at the hospital ,in hospital,at hospital的区别 in the hospital 和 in hospital的区别 in hospital和in the hospital的区别 in hospital和in the hospital的区别? “in hospital”和“in the hospital”的区别在哪里? 区别in the hospital 和at hospital in hospital 和 at hospital 的区别 on hospital和in hospital的区别 in hospital和in the hospital 还有in bed 和in the bed的区别 at hospital ,at the hospital ,in hospital,in the hospital的区别 stay in hospital和 in the hospital区别 in hospital 和 in the hospital 有什么区别吖?