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本文对美国医疗照顾方案（Ｍｅｄｉｃａｒｅ）受惠的白人和黑人，高收入者和低收入者的医疗服务利用作了调查，并对其差距进行了讨论分析。
This article investigates the use of medical services by white and black people, high-income earners, and low-income people who have benefited from Medicare, and discusses the gaps.