作业人员严禁班前、中饮酒，夜间作业必须保证不少于（）小时休息。
参考答案：8
Only when he reached the tea-house _____ it was the same place he'd been in last year.[ ]
A. he realized
B. he did realize
C. realized he
D. did he realize
男性，40岁，痔疮出血1年，乏力、面色苍白3个片，查体：贫血貌，巩膜无黄染。血象：白细胞4.6×109/L，红细胞3.9×1012/L，Hb65g/L，血小板330×109/L。
下列哪项检查准确性和敏感性最高
A．血清铁
B．血清铁总铁结合力
C．血清铁蛋白
D．红细胞内游离原卟啉测定
