紫绀的原因是（）
A.血液还原血红蛋白增多
B.血红细胞大量破坏
C.局部瘀血
D.毛细血管通透性增加
E.血红蛋白增多
参考答案：A
一名58岁女患者肥胖，空腹血糖6.8mmol/L(122mg/dl)，来住院检查。作OGTT，餐后2小时血糖8.4mmol/L(150mg/L)，关于诊断正确的是
A．糖尿病
B．非糖尿病
C．糖耐量异常
D．空腹血糖过高
E．须长期随访
He doesn't ____ have foreigners in his caf?, so he doesn't know how to serve the American family. [ ]
A. quite
B. seldom
C. often
D. always
