BEIJING, Jan. 5 (Xinhua) — Beijing will accelerate work to protect and utilize cultural relics in its core functional areas, and promote public access to more heritage sites along the Beijing Central ...

·一项随机对照研究结果显示，维生素D不仅不能降低癌症或心脏病的发病率，也不能预防跌倒，改善认知功能，减少心房颤动，减少偏头痛频率，改善中风结局，减少与年龄相关的黄斑变性，减少膝盖疼痛或降低骨折的风险。Manson说，维生素D不能降低骨折风险确实让许多人吃惊。