1. 确认  - 

2. 再三确认  - 

3. 重要的事情说三遍  -  https://baike.baidu.com/item/%E9%87%8D%E8%A6%81%E7%9A%84%E4%BA%8B%E6%83%85%E8%AF%B4%E4%B8%89%E9%81%8D/18131742