For a monthly flat fee, paid by the consumer or employer, HMOs provide a specified list of medical services both in and outside the hospital.个人或雇主每月交纳固定费用，卫生维护组织向其提供医院内外的一系列特定的医疗服务。Many tax advisers now offer fixed-fee interviews.现在许多税务顾问都提供收取固定费用的当面咨询服务。