Be like looking/searching for a needle in a haystack 如同大海捞针
like 像
look for/search for 寻找
needle 针
haystack 干草堆
There’re like, thousands of files piled up,it’ll be like looking for a need...
by the book 完全按照规章制度办事,按照规定,照章办事
go by the book 依章办事
play by the book按规定来
do something by the book按规定做某事
run something by the book 按规定管理、运营
The manager do...