纳斯达克综合指数开盘跌5.64点，跌幅0.13%，报4252.80点。标普500指数开盘跌1.49点，跌幅0.08%，报1885.27点。道琼斯工业平均指数开盘跌8.29点，跌幅0.05%，报16...