Unfortunately, women were not admitted to university in the past, ______, nowadays, they have got equal rights.

A．while

B．when

C．as

D．since

糖尿病病人在应激情况下，预防酮症酸中毒发生的关键是______

A．加强心理护理
B．加大口服降糖药
C．积极控制感染
D．严格控制饮食
E．增加胰岛素用量