题目内容
A company should try to retain a customer only as long as the cost to discourage defection is lower than the lost profit.
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The marketing funnel identifies the profitability of consumers at each stage in the decision process.
Focusing disproportionate effort on high-profit customers will lead to lower customer profitability for those customers.
Frequency programs are designed to reward customers who buy often and in substantial amounts.
关于止咳平喘药的选择用药，正确的有
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