Do a second pass to clean up the code/comments and make further optimizations
到1988年，为了服务新兴的Sun City West分区，Sun Health基金会捐赠900万美元，建成了Del E. Webb Memorial Hospital（现名Banner Del E. Webb Medical Center），同样以老年护理为核心，和第一家医院形成互补，覆盖更多退休居民。
，这一点在91视频中也有详细论述
2021年2月，在全国脱贫攻坚任务如期完成的重大时刻，习近平总书记赴贵州考察调研时来到化屋村，勉励乡亲们脱贫之后，要接续推进乡村振兴，加快推进农业农村现代化。
int exchanged = 1; // 标记本轮是否发生交换
Isaacman also said the agency would halt work to develop a more powerful version of the SLS rocket's upper stage, known as the Exploration Upper Stage, or EUS. Instead, NASA will go forward with a "standardized," less powerful stage but one that will minimize major changes between flights and utilize the same launch gantry.