用电镜和酶组织化学技术探明了尼罗罗非鱼（Ｔｉｌａｐｉａｎｉｌｏｔｉｃａ）肾近曲小管细胞嗜酸性颗粒的结构实质、来源和存在意义。结果表明：光镜下鱼肾近曲小管细胞的嗜酸性颗粒是各种溶酶体，其中一些较大的颗粒，电镜下是体积较大的单界膜小体，属次级溶酶体，可能与蛋白质等大分子物质的重吸收有关 The structure, origin and significance of eosinophilic granules in proximal tubular cells of Tilapian pilotica were elucidated by electron microscopy and enzyme histochemistry. The results showed that the eosinophilic granules of proximal tubule cells of fish and kidneys were all lysosomes under light microscope. Some of the larger granules, under the electron microscope, were bulky monolayer membrane bodies, belonging to secondary lysosomes, May be related to the reabsorption of macromolecules such as proteins