配伍題當(dāng)患者的Hb小于多少時應(yīng)及時補充濃縮紅細胞()|手術(shù)患者Hb在多少以上可安全耐受麻醉手術(shù)()|重癥患者(ASAⅢ~Ⅳ級)麻醉手術(shù)期間應(yīng)維持Hb大于多少()

A.50g/L
B.80g/L
C.100g/L
D.70g/L
E.60g/L