打破沙锅问到底

Explanation: Analogy to the bottom of things investigated. 　　Usage: Complex sentence; as the predicate attribute; describe and make things clear 　　Source: Song Huang Ting "humble Xuan Song": "Seeking a coincidence not available, humble come from? Break the sediment basin one asked, eyes open so mad child, self-defeating, as the snake feet, not to mention the first head of security, housing estates under the security After all, more than a clever person, who less than humble. " 　　Examples: Why does not she go back to Backstage? But I also do not like ~. ★ Ba Jin "Reunion" Thesaurus:  insist on getting to the bottom of sth.