对诊断慢性肾盂肾炎最有意义的是（）。
A．尿频、尿急、尿痛反复发作
B．清洁中段尿细菌培养计数＞105/ml
C．畏寒发热，尿白细胞数增高
D．尿亚硝酸盐还原试验阳性
E．肾小管功能持续性损害
参考答案：E
解析：
慢性肾盂肾炎的病变特点是肾盂和肾间质的慢性化脓性炎症，肾组织瘢痕形成和肾盂、肾盏纤维化和变形。肉眼见一侧肾脏有病变或双侧肾脏病变不对称，出现分布不均匀和不规则的灶状或片状瘢痕病灶，病变处肾包膜与周围组织粘连，肾外形改变。切面肾盂扩张、变形，肾盂黏膜增厚粗糙。镜下见病灶内肾小球周围纤维化，进一步发展可导致肾小球纤维化、玻变。肾小管萎缩，部分腔内可见胶样蛋白管型形似甲状腺滤泡。肾间质内出现大量淋巴细胞、单核细胞、浆细胞浸润，并有不等量的中性粒细胞。
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| Vitamins(维生素) are a discovery of the 20th century. A hundred years 1 , no one knew anything 2 them. The vitamins are 3 by letters of alphabet. Vitamin A 4 by the eyes. There is vitamin A in milk, butter and green vegetables It 5 by the body. Vitanun B must be supplied (提供) 6 by some of our food. The skins 7 grains of all sorts have vitamin B in them. Vitamin C is very important 8_ the body. Without it 9 teeth will become loose and their arms and legs become weak. Oranges and tomatoes 10 vitamin C in them. There are other vitamins. But these A, B,C are the most important. | ||||
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