患者男性,31岁。无明显诱因出现皮肤紫癜2周,口腔血疱1周,多次查血小板均减少,白细胞正常,血红蛋白正常,目前血小板为29×109/L。骨髓象显示:骨髓巨核细胞增多,形成血小板的巨核细胞减少。 根据临床特点和骨髓象本患者的诊断是
A. 白血病
B. 过敏性紫癜
C. ITP
D. 再障
E. 骨髓瘤
A tribe of Plains Indians, the Assiniboins, had the distinction of hunting on foot. During the winter months the hunters wore snowshoes to chase the buffalo into the deep snow, where the animals were easily killed, The Assiniboins were thrifty people who utilized all of their dead prey: the meat was their food; their clothing came from the hides; their tools and weapons came from the bones and horns. Once the other parts had been disposed of, the children used the buffalo’s ribs as sleds. The passage indicates that the Indians chased the buffalo into deep snow so that the buffalo could NOT ______.
A. escape easily
B. destroy crops
C. frighten their children
D. disturb other animals