at the front of \in the front of 什么区别？

都是在前部，内部，

如在房子的窗前，向外看。人在内。
但个人感觉，
at the front of与
in the front of
也有差别。

in 强调立体空间。

at 强调平面空间。

in front of在…前面，如：
There is a tree in front of the house.房子前面有一棵树。
He sits in front of me.他坐在我前面。
in the front of 在…前部(在某范围以内)
如：There is a big desk in the front of the classroom. It's for the teacher.
教室的前部有一张大桌子，是老师用的。
(在教室范围里面)
at the front of 在…前部与in the front of同意
at…强调“前部的某一点” in强调在…范围的前部
如：There is a man boating at the front of the boat.船的前部有一个人在划船