96. 下列關於 PPF(Progressive pulmonary fibrosis)的定義，何者為非？ (A) worsening respiratory symptoms within past 2 years。 (B) Absolute decline in DLCO (corrected for Hb) of ＞10% within 1 year of followup。 (C) New ground-glass opacity with traction bronchiectasis within the past year。 (D) Increased extent or increased coarseness of reticular abnormality within the past year。