dot the/(your) i's and cross the/(your) t's
informal
to do something very carefully and in a lot of detail.
She writes highly accurate reports - she always dots her i's and crosses her t's.
英语词组固定搭配大全包含18674条英汉双解词组，基本涵盖了全部常用英文词组、短语的翻译及用法，是英语学习的有利工具。