47.關於用力肺活量（forced vital capacity, FVC），下列敘述何者正確？ (A)於阻塞性肺病（obstructive lung disease）及侷限性肺病（restrictive lung disease）皆下降 (B)於阻塞性肺病（obstructive lung disease）及侷限性肺病（restrictive lung disease）皆上升 (C)於阻塞性肺病（obstructive lung disease）上升，於侷限性肺病（restrictive lung disease）下降 (D)於阻塞性肺病（obstructive lung disease）下降，於侷限性肺病（restrictive lung disease）上升