[from first to last] [把事情的]头尾均描述一遍

yuán yuán běn běn

from beginning to end

in its entirety

in accord with fact

literal

give chapter and verse for; as exact as it is; exactly as it is; from first to last; find out all the details; from the very beginning to the end; (to tell) in detail from the very beginning; tell the real story; the whole story:

【释义】从头到尾按原来的样子。指详细叙述事情的全部起因和整个过程，一点不漏。

【近义】从头到尾、有头有尾

【反义】有头无尾、东鳞西爪

【出处】汉·班固《西都赋》：“元元本本，殚见洽闻。”

【用例】差官便抢上一步，把这事情原原本本详陈一遍。（清·李宝嘉《文明小史》第十二回）