at one’s fingertips 的 用法 及 造句

Question

如题所述

Answer 1

at one's fingertips 了如指掌,在手头,洞若观火
例句：I had it at my fingertips. 我对一切了如指掌，
Computer technology puts all the information in the world at one's fingertips.
计算机技术使世界上所有的信息了如指掌
You’d better ask Professor William about the population issues. He has the whole subject at his fingertips.
关于人口的问题，可请教廉教授，因他对于整个课题也十分熟悉。
具体释义：
手指是 Finger，手指尖是 Fingertip，