55.COPD病人拒絕N-acetylystin吸入治療，病人告知曾有反應性支氣管痙攣之經驗，呼吸治療師應建議下列何種應變措施？(A)鼓勵病人多喝水即可 (B)先給予支氣管擴張劑吸入治療，再吸入N-acetylcysteine (C)吸入N-acetylcystcinez後馬上給予支氣管擴張劑吸人 (D)以distilled water取代N-acetylcysteine