Objective: To explore the prevalence state of HBV and countermeasure among the practical staff bing engaged in food.

目的：分析探讨食品生产企业从业人员HBV感染现状与对策。

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Conclusion: HFRS will be in a low prevalence state in Shandong Province, but the epidemic situation is far from optimistic.

结论：山东省HFRS会保持低流行状态，但流行形势仍不乐观。

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Objective:To know the symptoms of women in perimenopausal period and prevalence state of chronic illnesses in the urban and rural areas of Hebei province and the relativity between them.

了解河北各地区城乡女性的围绝经期症状，患慢性疾病状况与患病的相关性。

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The biggest difficulty, Wintemute continued, is that almost all of the associations between more laws and fewer deaths disappeared when the investigators took into account the prevalence of gun ownership in each state.

CNN: Study links gun laws and lower gun mortality