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... ...
索引文件.dim
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索引文件.dii
Header
Field
Field
Footer
... ...
Field
Footer
... ...
... ...
RightSubtreeHasNotLeafChild
LeftSubtreeHasNotLeafChild
LeftSubtreeHasLeafChild
RightSubtreeHasLeafChild
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... ...
RightSubtreeHasLeafChild
叶子节点信息