Critics have increasingly focused on gifts and payments to physicians as a primary cost driver of rising prescription-drug spending.

针对处方药越开越贵的情况，越来越多的批评人士将矛头直指收受礼品礼金的医生。

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Transactions costs : The down payment is the primary upfront cost one associates with buying a home.

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Keep in mind, however, that such a primary would cost the state money.

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And, because the economic value is high, markets want more and consequently drive energy demand in large measure without regard to primary fuel cost--the cost of energy fades in to the twilight.

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