指导GBD数据库选题及写作~

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每个月都会推出新的热点课程，帮助咱们

现在的情况是Gbd写一篇中一篇(不撞题情况)，NHANES基本5分左右问题不大，MR投稿需要多费心思(最近中的不少)

师妹师弟不断产出高分文章~

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