将以下内容翻译为正式且简洁的英文：

中国的社会保障体系涵盖针对老年人、残疾人、灾民等各种群体及其多样化的需求的全方位多层次保障。在医疗服务和药品领域，我们已经经历了多次细致及时的改革，从而显著改善了医疗质量、提高了医疗覆盖率，缩小了城乡医疗服务差距。

We have established a comprehensive and multi-tiered social security system in China that addresses the diverse needs of various groups, including the elderly, the disabled, and disaster victims. In the fields of medical services and pharmaceuticals, we have undergone multiple meticulous and timely reforms, significantly improving medical quality, increasing medical coverage, and narrowing the gap in access to medical services between urban and rural areas.
user
We have implemented a comprehensive and multi-tiered social security system in China, addressing diverse needs across various groups such as the elderly, disabled, and disaster victims. In healthcare and pharmaceuticals, we have carried out multiple precise and timely reforms, substantially enhancing medical quality, expanding coverage, and reducing disparities in medical access between urban and rural areas.
assistant