Answer: E

Anemia refers to a common clinical symptom in which the volume of red blood cells in the peripheral blood of the human body is reduced and is lower than the lower limit of the normal range. Because the determination of red blood cell volume is complicated, adult men with Hb <120g/L, adult women (non-pregnant) with Hb <110g/L, and pregnant women with Hb <100g/L will have anemia. Neonatal Hb <145g/L is anemia. Neonatal anemia classification: Mild: Hb120~145g/L, 90~120g/L is moderate, 60~90g/L is severe, Hb<60g/L is extremely severe.