[pī huā dǎo táo]   

批    砉    导    窾    犹言批郄导窾。比喻善于从关键处入手，顺利解决问题。

批砉导窾，pī huā dǎo kuǎn，成语，比喻善于从关键处入手，顺利解决问题。

Cut the bones between the joints and make use of the momentum to decompose the boneless parts

批鳞请剑    批毛求疵    批郄导窾    批亢捣虚    批风抹月