PubMed® Comprises much more than 35 million citations for biomedical literature from MEDLINE, lifetime science journals, and online books. Citations might involve hyperlinks to total text articles from PubMed Central and publisher Sites. 进入新页面，登录设备管理右侧有个按钮，默认情况下是关闭的，我们点击打开； 知乎，让每一次点击都充满意义 —�?欢迎来到知乎，发现问题背后的世界。 便捷易用... https://usemeupdubai.ae