二尖瓣狭窄大咯血的直接原因是（） ["肺淤血","肺栓塞","支气管黏膜血管破裂","支气管扩张","支气管静脉曲张破裂"]
乳头肌断裂致急性二尖瓣关闭不全最常见的病因是（） ["风湿性心脏病","冠心病","先天性心脏病","老年退行性变","感染性"]
下列哪项符合急性淋巴细胞性白血病（） ["为儿童最多见的急性白血病.","易发生DIC出血严重","化疗效果差","中枢神经系统白血病少见","与EB病毒感染有关"]
下列哪一项组合是错误的（） ["二尖瓣狭窄一杂音较局限，左侧卧位较清楚","二尖瓣关闭不全一杂音向腋下传导","三尖瓣关闭不全一杂音常越过左腋中线","主动脉瓣关闭不全一杂音向心尖部传导","主动脉瓣狭窄一杂音向颈部传导"]
慢粒最突出的特征是（） ["粒细胞显著增多，脾明显肿大","肝肿大","腹胀，食后饱胀","乏力、低热、多汗","骨痛明显"]
简述原发性肝癌
