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男孩，6岁，发热4天，双侧腮腺以耳垂为中心肿大2天。体检：体温38.5℃，神志清楚，双侧腮腺3cm×4cm，有压痛，咽红，腮腺管口有红肿，心肺无异常，诊断为流行性腮腺炎。该病不常见的并发症是（）。
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男性，35岁，因腹痛、脓血便2个月来诊患者2个多月前出差回来后突然发热达38℃，无寒战，同时有腹痛、腹泻，大便每日10余次，为少量脓血便，伴里急后重，曾到附近医院化验大便有多数白细胞，口服几次庆大霉素和黄连素好转，以后虽间断服用黄连素，但仍有粘液性便，左下腹不适，自觉日渐乏力遂来诊，病后进食减少，体重似略有下降，具体未测，小便正常，睡眠尚可。既往体健，无慢性腹泻史，无药物过敏史，无疫区接触史。检体：T37.2℃,P86次/分，R20次/分，Bp120/80mmHg，无皮疹和出血点，浅表淋巴结未触及，巩膜不黄，咽(-)，心肺(-)，腹平软，左下腹轻压痛，无肌紧张和反跳痛，未触及肿块，肝脾未触及，腹水征(-)，肠鸣音稍活跃，下肢不肿。化验：血Hb129g/L,WBC11.4?109/L,N78%,L22%,plt210?109/L,大便常规为粘液脓性便，WBC20-30个/高倍，偶见成堆脓球，RBC3-5个/高倍，尿常规(-)
计算题：对某一景观进行调查时，在景观中设置了20个样地进行调查两种景观要素A和B的相关性。结果为：A、B两种景观要素都有的样方数为6，有B景观要素无A景观要素的样方数为4，有A景观要素无B景观要素的样方数为5，A、B景观要素全无的样方数为5。试问景观中A、B两种景观要素是正关联性还是负关联？
阅读理解：请根据短文内容，为每题确定l个最佳选项。 How We Form First Impression。 We all have first impression of someone we just met. But why? Why do we form an opinion about someone without really knowing anything about him or her - aside perhaps from a few remarks or readily observable traits? The answer is related to how your brain allows you to be aware of the world. Your brain is so sensitive in picking up facial traits. Even very minor difference in how a person’s eyes, ears, nose, or mouth are placed in relation to each other makes you see him or her as different. In fact, your brain continuously processes incoming sensory information - the sights and sounds of your world. These incoming signals are compared against a host of “memories” stored in the brain areas called the cortex(皮质) system to determine what these new signals “mean”. If you see someone you know and like at school, your brain says “familiar and safe”. If you see someone new, it says, “new and potentially threatening”. Then your brain starts to match features of this strangers with other “known” memories. The more unfamiliar the characteristics, the more your brain may say, “This is new, I don’t like this person” Or else, “I’m intrigued(好奇的)”. Or your brain may perceive a new face but familiar clothes, ethnicity, gestures - like your other friends; so your brain says: “I like this person”. But these preliminary impressions can be dead wrong. When we stereotype people, we use a less mature form of thinking (not unlike the immature thinking of a very young child) that makes simplistic and categorical impressions of others. Rather than learn about the depth and breadth of people - their history, interest, values, strengths, and true character - we categorize them as jocks(骗子), peeks(反常的人), or freaks(怪人). However, if we resist initial stereotypical impressions, we have a chance to be aware of what a person is truly like. If we spend time with a person, hear about his or her life, hopes, dreams, and become aware of our cortex, which allow us to be humane.Our first impression of someone new is influenced by his or her______.
患者女，25岁。妊娠37周，G1P0，因羊膜破裂入院待产。既往身体健康，无传染病及遗传性疾病史，分娩过程顺利，产一男婴7斤重。分娩后突然出现呼吸困难、发绀、抽搐、休克死亡。最可能发生的是（）
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