- the tip of a finger（手）指尖。
attrib.
- using or operated by the fingers用手指的; 用手指操作的：
police made a fingertip search of the area.
警察用手指搜查了那个场所。
短语
at one's fingertips
- (especially of information) readily available; accessible（尤指信息）近在手边的, 唾手可得的：
until we have more facts at our fingertips, there is no use in speculating.
除非我们手头有更多的事实, 否则猜测是毫无用处的。
by one's fingertips
- only with difficulty困难地, 艰难地, 举步维艰地：
the prime minister clung on by his fingertips.
首相举步维艰地坚持着。
to one's fingertips
- completely彻底地, 完全地：
he is a professional to his fingertips.
他是一个地地道道的专业人士。