Unverified50% confidenceSolutionExact time
分层采样（stratified sampling）先将用户查询按意图类型分类或通过embedding聚类，再从每个类别按比例或等量采样，比纯随机采样更能确保评估集代表性
1
Sources
50%
Confidence
Long-term
Relevance
8/20/2026
First Seen
Sources
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