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从本期起,将以实例-问题解答的形式,不定期刊出职业流行病学调查实例习题,希望对厂矿医务人员学习这方面的专业知识有所帮助。
From this issue onwards, we will publish a case study of occupational epidemiology from time to time in the form of an example-problem-solving. We hope that it will be helpful to the medical staff in factories and mines to learn their expertise in this field.