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四、志愿者：隐藏的“成本利器”，也是社区温度Sun City的医疗体系里，还有一群不可或缺的人——志愿者。志愿者团队规模庞大，常年活跃。根据最新信息（截至 2026 年），Boswell 医院有约 121 名活跃志愿者，Del E. Webb 有约 182 名，因此Sun City 也被称为“志愿者之城”（City of Volunteers）。
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It’s also worth noting that even if alternatives superior to agar were found, scientists are reluctant to abandon established protocols (even when microbiologists do use other jellies, they often still add agar to the mix, for example, to increase the gel strength of the solid media). As agar has been the standard gelling agent in microbiology for around 150 years, an enormous infrastructure of standardized methods, reference values, and quality control procedures has emerged around its specific properties. Switching to a different medium (even a superior one) means results may not be directly comparable to decades of published literature or to other laboratories’ findings.
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