52.一位26歲女性患有高血壓半年，三個月前開始伴有心悸、頭痛、流汗。主治醫師安排她做尿液24小時 catecholamine測定。若欲給藥治療其高血壓，下列何者不適宜？ (A)α-adrenergic blocker alone (B)β-adrenergic blocker alone (C)calcium channel blocker (D)β-adrenergic blocker after α-adrenergic blocker