Method: Describe disadvantages of current payment system in medical market, compare advantages and disadvantages between a few kinds of payment systems of "single-diagnosed disease".
方法：采用比较的方法，先对现行医疗收费方式的弊端进行阐述，再对目前可行的几种单病种收费方式优点与不足进行比较。
Letter of credit has become the most widely adopted method of payment in the current international trade.
信用证支付方式已成为当今国际贸易中最为广泛的支付方式。
Letter of credit has become the most widely adopted method of payment in the current international trade.
信用证支付方式已成为当今国际贸易中最为广泛的支付方式。
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