if (len === 0) return []; // 补充空数组边界，避免后续逻辑出错
The core of OsmAnd's HH-Routing is an elegant two-level hierarchy built upon "area clusters."
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When he was five years old, his father died in a car accident.
Darren Connor, 55, appeared on Friday at Manchester magistrates court, where he denied possession of an offensive weapon in a public place without lawful authority or reasonable excuse.
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