男，18岁，外伤1小时就诊。结合超声声像图，诊断为() ["A．脾外伤血肿","B．脾淋巴管瘤","C．膈下积液","D．脾皮样囊肿","E．脾血管瘤"]
艾滋病的分期及各期特点?
如何确诊HIV感染者?试述各种可用的方法，哪些方法临床最常应用?
男，25岁，例行体检时超声发现脾内占位。根据超声声像图诊断为() ["A．血管瘤","B．淋巴管瘤","C．畸胎瘤","D．淋巴瘤","E．脾内钙化灶"]
男，60岁，便血就诊。PE：左下腹可扪及一肿块，质硬。结合超声声像图，诊断为() ["A．Crohn’s病","B．肠梗阻","C．肠癌","D．肠套叠","E．肠结核"]
试述HIV如何入侵人体T淋巴细胞及其复制过程?
