A.血紅蛋白<125g/L B.血紅蛋白<110g/L C.血紅蛋白<90g/L D.血紅蛋白<75g/L E.血紅蛋白<60g/L
A.10%~20% B.20%~30% C.35%~45% D.45%~55% E.55%~65%
A.37周 B.38周 C.39周 D.41周 E.42周