2.2.3 Mermaid 类图（classDiagram）
U.S. 30-year mortgage rates have dipped under 6% for the first time since September 2022, creating the best affordability window to purchase a home in more than three years.
，更多细节参见搜狗输入法2026
经初步调查，邱某（男，25岁）驾驶车牌号为川ARXXXS的普通二轮摩托车沿西三环路二段外侧辅道行驶至事发路段变更车道时，与正在此处执勤的交警发生碰撞。事故发生后，受伤交警被第一时间送往医院救治，暂无生命危险。
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