on the case
全力以赴、专心致志、尽职尽责
口语·表示正在积极处理某事
英文释义
actively investigating or working on a situation or problem
例句
Don't worry about the leak; the plumber is already on the case.
典故来源
源自侦探或警察工作，指负责调查案件，后泛指积极处理问题。