美国商业活动创四年新高，道指大涨559点
Dow surges 559 points as US business activity hits four-year high
The surge in US business activity suggests a broadening economic momentum, indicating potential for sustainable growth amid easing inflation.
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更进一步：量化金融体系
看懂新闻只是起点——沿量化金融路径，把它变成能交付的工程能力