in the beginning和at the beginning的区别

"in the beginning" "起初"; "在开始的时候"
1、with reference to the origin or beginning
= primitively; originally
2、before now
eg."Why didn't you tell me in the first place?"
= in the first place; earlier; to begin with; originally
"at" the beginning "在起点处"; "在开端处"
1、to indicate the *place* where something begins or is begun.
eg.at the beginning of the road
2、to indicate the *first part*of something.
eg.The front matter is at the beginning of the book.