【名词&注释】
胃溃疡(gastric ulcer)、消化道(digestive tract)、参考值(reference value)、再生障碍性贫血(aplastic anemia)、功能障碍(dysfunction)
[单选题]经典的Westgard规则指的是
A. 12s(警告)/13s
B. 12s(警告)/13s/22s
C. 12s(警告)/13s/22s/R4s/41s/10x
D. 12s(警告)/13s/22s/R4s
E. 12s/13s/22s/R4s/41s/10x