______, he always makes time for his family.

A. No matter he is busy        B. No matter how busy he is

C. However he is busy         C. However busy is he

患者女性，50岁，因牙龈疼痛、溃疡5年 就诊。检查可见全口牙龈剥脱状，鲜红 色, 弥漫性；浅层糜烂及破裂的疱壁；两颊、软腭有大小不等、外形不规则的糜烂面，咽充血，舌腭弓和咽腭弓粘连，此时，最有助于诊断的检查是

A．皮肤大疱
B．外阴溃疡
C．眼部球结膜、睑结膜粘连
D．唇红部血痂
E．唇红一皮肤界限消失