// 得到API中的合约名与交易所
        private void GetApi_Symbol_Exchange_TickSize(Instrument instrument,
            out string altSymbol, out string altExchange,
            out string apiSymbol, out string apiExchange,
            out double apiTickSize)
        {
            // 取合约别名
            altSymbol = instrument.GetSymbol(this.id);
            altExchange = instrument.GetExchange(this.id);
            apiTickSize = instrument.TickSize;

            // 取合约在API中的名字
            apiSymbol = altSymbol;
            apiExchange = altExchange;

            InstrumentField _Instrument;
            if (_dictInstruments.TryGetValue(altSymbol, out _Instrument))
            {
                apiSymbol = _Instrument.InstrumentID;
                apiExchange = _Instrument.ExchangeID;
                apiTickSize = _Instrument.PriceTick;
            }
        }