Question: 沪深300指数的最新交易日价格
Answer: 必答点：沪深300指数最新股票价格（即最新交易日收盘价）
精度要求：仅允许四舍五入误差
Time: 2025/8/14
Real-time data: {"000300___SH":{"RT_TIME":"150009","RT_LAST":"4173.31","RT_DATE":"20250814"}}