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