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十几年来,我所在病因研究方面作了一系列的调查研究和实验研究工作,结果说明,克山病分布在一定的地区,年度发病呈波浪起伏的现象,季节多发,多发的人群与
Over the past decade or so, I have conducted a series of investigations and experimental studies on the cause of the disease. The results show that Keshan disease is located in a certain area and the incidence of annual ups and downs is fluctuating. The population with multiple seasons and multiple occurrences