【名词&注释】
心脏病(heart disease)、凝血因子(coagulation factor)、血清胆红素(serum bilirubin)、禁忌证(contraindication)、胆红素浓度(bilirubin concentration)
[单选题]当血清胆红素浓度(bilirubin concentration)高于下列哪项指标时,临床上即可见明显的黄疸( )
A. 1.7μmol/L
B. 3.4μmol/L
C. 34.4μmol/L
D. 17.1μmol/L
E. 30.4μmol/L