Methods:5 chinese white rabbits were selected randomly and the venous blood reticulocytes were counted before exsanguination,and at 5,7 and 10 days after exsangquinations.

• 方法:随机取中国白兔5只,分别在干预前及干预后的第5、7、10天抽取耳缘静脉血进行网织红细胞检测;