成员的完整列表，这些成员属于 CThostFtdcOptionInstrMiniMarginField,包括所有继承而来的类成员

BrokerID	CThostFtdcOptionInstrMiniMarginField
InstrumentID	CThostFtdcOptionInstrMiniMarginField
InvestorID	CThostFtdcOptionInstrMiniMarginField
InvestorRange	CThostFtdcOptionInstrMiniMarginField
IsRelative	CThostFtdcOptionInstrMiniMarginField
MinMargin	CThostFtdcOptionInstrMiniMarginField
ValueMethod	CThostFtdcOptionInstrMiniMarginField