14.已接受控制型藥物治療時,下列何者可直接確診為氣喘病患?
(A)呼吸症狀與氣流限制均出現變異(variable respiratory symptoms and variable airflow limitation) (B)呼吸症狀出現變異但無氣流限制變異(variable respiratory symptoms but no variable airflow limitation) (C)很少呼吸症狀、肺功能正常且氣流限制無變異(few respiratory symptoms, normal lung function, and no variable airflow limitation) (D)持續性喘而且固定的氣流限制(persistent shortness of breath and fixed airflow limitation)