A major part of the Ryan plan would change Medicare from a program that directly pays medical bills for retired people. Instead, people would get money to buy health insurance from private companies. 瑞安计划的主要部分将把医疗保险从一个直接支付退休人员医疗费用的程序,改为政府为人们购买私营公司的医疗保险提供资金。