对症下药yīngwénjièshì:

n.  suit the medicine to the illness n.  (fig) suit the remedy to the case n.  prescribe the right remedy for an illness v.  (literally) to give the right prescription for an illness--to take the right remedial steps to correct a shortcoming

(fēizhùcèchéngyuánměiyèzànxiàn 4 lì)

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