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问题66:正常骨髓在需要时具有多少倍的产生红细胞的代偿能力?a:1～2倍;b:6～8倍;c:10～15倍;d:20～30倍;e:40～50倍。答:b 项正确。正常骨髓在出血或溶血等红细胞丧失的情况下,为了补偿此一丧失,具有正常的6～8倍的红细胞再生能力。因而在慢性溶血性疾病时,只要红细胞寿命不短于正常的6～8分之一(15～20日),就不出现贫血。问题67:于下列( )内的序号后填入正确答案(a、b、c)。
Question 66: How many times does the normal bone marrow have compensatory ability to produce erythrocytes when needed? A: 1 to 2 times; b: 6 to 8 times; c: 10 to 15 times; d: 20 to 30 times; e: 40 ~ 50 times. A: b is correct. Normal bone marrow in the case of hemorrhage or hemolysis and other loss of red blood cells, in order to compensate for this loss, with 6 to 8 times the normal red cell regeneration. Thus in chronic hemolytic disease, as long as the life expectancy of erythrocytes is not shorter than the normal 6 to 8 (15 to 20), there will be no anemia. Question 67: Fill in the correct answer (a, b, c) after the serial numbers in () below.