夫瘡疽等癥．種種不同．又況五土所產(chǎn)濃薄．人之老幼虛實．形志苦樂不等．各有所宜．豈有一法一方而通哉．然醫(yī)之精通．悟之權(quán)衡機變．孰敢以一定之方而求愈者鮮矣．丹溪云．以古方而治今人之病．如拆舊屋而改蓋新房．尺寸豈能相合．必經(jīng)良匠之手．方能相合．以古方而治今人之病．必經(jīng)良醫(yī)之手．方得其宜．故先賢所立補泄汗下針灸淋 敷貼炙烙等法治之．蓋取其合宜之用也．當察瘡之緩急．勢之輕重．治之汗下．法之逆從．癥之標本．方之奇偶．皆在于醫(yī)之權(quán)變．寒熱溫涼．湯液加減．貴乎臨癥處方．運用一時通變之機．而取百發(fā)百中理也哉．