An internet is a combination of networks connected by (1). When a datagram goes from a source to a (2), it will probably pass many (3) until it reaches the router attached to the destination network. A router receives a (4) from a network and passes it to another network. A router is usually attached to several networks. When it receives a packet, to which network should it pass the packet? The decision is based on optimization: Which of the available (5) is the optimum pathway?空白(5)处应选择()
A. pathways
B. routers
C. diagrams
D. calls
女性,45岁,反复发作腹泻10年,多于工作紧张时发生,表现为晨起腹泻3~4次/日,伴便前腹痛,便后缓解,体重无变化,近由于变换工作上述症状加重,大便5~6次日,有黏液,述自服黄连素有效,停药反复。(1)初步诊断是什么?(2)该病人除结肠镜检查外还应进行什么检查以明确诊断?(3)IBS的诊断标准是什么?
女性,40岁,大便一天4~5次5年余,多于饭后,精神紧张时发生,便前多出现腹痛,便后缓解。大便为黄稀便或水便,无夜间腹泻,血便或消瘦。该患者治疗上可采用()
A. 小檗碱(黄连素)
B. 柳氮磺胺吡啶
C. 地芬诺酯(复方苯乙哌啶)
D. 氟哌酸
E. 甲硝唑(灭滴灵)
男,18岁,头部外伤2小时。CT示右颞叶前部团块样高密度影,鞍上池右侧变形、变窄,左移。最可能的诊断为()
A. 右颞叶血肿,小脑扁桃体疝
B. 右颞叶单纯血肿
C. 右颞叶血肿,伴脑水肿
D. 右颞叶急性血肿,大脑镰下疝
E. 右颞叶急性血肿,钩回疝