"in the hospital"和"at the hospital"的区别和用法

in the hospital 和at the hospital ,in hospital,at hospital的区别 区别in the hospital 和at hospital "in the hospital"和"at the hospital"的区别和用法 in hospital 和 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? at hospital ,at the hospital ,in hospital,in the hospital的区别 in the hospital 与 at 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?