当然，医院也需要投入少量资金，用于志愿者的培训和协调，但这笔支出，远低于节省下来的劳动力成本。可以说，志愿者是Sun City医疗体系可持续运营的“隐形支撑”，尤其是在医院高度依赖Medicare、报销率低的背景下，他们的付出，极大缓解了医院的预算压力。
This is a reasonable optimization to do. It is never incorrect; your，更多细节参见WPS官方版本下载
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2-phase A* already uses many heuristics which don't always create an optimal route and still 5-10x slower.