Unverified50% confidenceSolutionExact time
文本块重叠处理可在关键知识点跨越切分边界时保留语义连贯性，例如chunk_size=500、chunk_overlap=50
1
Sources
50%
Confidence
Long-term
Relevance
7/14/2026
First Seen
Sources
从零构建离线RAG应用：PDF文档本地问答完整指南
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