近义词：了如指掌 - 洞若观火、管窥蠡测
词语解释 liǎo rú zhǐ zhǎng ㄌㄧㄠˇ ㄖㄨˊ ㄓㄧˇ ㄓㄤˇ
了如指掌（瞭如指掌）
◎ 了如指掌 liǎorúzhǐzhǎng
[have sth.at one’s fingertips; know as one know his ten fingers; know like a book; know as well as a beggar knows his bag] 形容对情况极为清楚
对他们的活动,他完全了如指掌
词语解释 liǎo rú zhǐ zhǎng ㄌㄧㄠˇ ㄖㄨˊ ㄓㄧˇ ㄓㄤˇ
了如指掌（瞭如指掌）