肌萎缩性侧索硬化症病变常不累及() ["A．中央前回","B．中央后回","C．脑干","D．脊髓","E．小脑"]
女，40岁，近3个月来排便次数增多，下腹隐痛，大便检查有脓细胞及少数吞噬细胞，经按慢性菌痢治疗症状时轻时重，此时应首先作() ["A．钡灌肠","B．直肠镜检","C．乙状结肠镜检","D．直肠指检","E．纤维结肠镜检查"]
脑动脉粥样硬化可引起下列哪些病变() ["A．脑回变窄，脑沟变宽、变深","B．脑血栓形成","C．灶性脑软化及腔隙样坏死","D．广泛性脑实质内出血","E．蛛网膜下隙变大，脑脊液增多"]
男性，35岁，肛门持续性剧烈疼痛3天，局部有肿物突出，无便血。查体：体温36.5℃，肛门齿状线旁有0.7cm直径的肿物，稍硬，呈暗紫色，触痛。最可能的诊断是() ["A．肛门周围皮下脓肿","B．肛裂","C．直肠息肉","D．血栓性外痔","E．内痔脱出"]
坐骨直肠窝脓肿早期切开引流的指征是() ["A．体温升高","B．局部有波动","C．局部发红，触痛明显","D．伴有排尿困难","E．白细胞总数及中性粒细胞增高"]
儿童常见的神经系统恶性肿瘤是_______、________及_______。
