在买卖股票中,有时可以交易,有时报错“订单Order({'delay_time': None, 'created': Timestamp('2016-03-04 09:31:00'), 'dt': Timestamp('2016-03-04 09:31:00'), 'limit': None, 'id': 'eec59deb5eba4cd38e807cc8c388a817', 'commission': 0, 'limit_reached': False, 'operate_type': 'long', 'is_delayed': False, 'symbol': '601988.SH', 'amount': 1190900, 'tax': 0, 'style_name': 'MarketOrder', 'filled': 0})撮合失败” 这是为什么?