50% bill size是说50% of patients pay this amount or less, and 50% pay more. This figure provides an estimate of the typical bill sizes for patients
90% bill size是说90% of patients pay this amount or less, and 10% pay more. This figure provides an estimate of the upper range of bill sizes.
然后这是个大概的估价,每个人因情况不同应该账单也不同
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