34.下列何項血液檢驗指標較符合 warfarin 治療肺動脈栓塞 ( pulmonary embolism ) 的治療標的 ( dosing target )？ (A) activated partial thromboplastin time ( aPTT )＝正常上限值之 1.5 倍 (B) activated partial thromboplastin time ( aPTT )＝正常上限值之 2.5 倍 (C) international normalized ratio ( INR )＝1.5 (D) international normalized ratio ( INR )＝2.5