來龍去脈（來龍去脈）　

◎ 來龍去脈 láilóng-qùmài

[pedigree;origin and course of development;cause and effect; ins and outs; sequence of actions; ways and wherefores; whence and wither] 原是過去風(fēng)水先生的說法,認(rèn)為山勢如龍,從頭到尾都有血脈連貫。現(xiàn)在常用來比喻事物的來歷或事情的前因后果

文件的來龍去脈