13. 下列何者其肺功能檢查通過呈現侷限性通氣障礙 (restrictive ventilatory impairment): (A)氣喘病(Asthma) (B)慢性支氣管炎 (C)肺氣腫 (D)囊腫性纖維化(cystic fibrosis) (E)原因不明性肺纖維化(idiopathic pulmonary ? fibrosis)