* 时间复杂度：O(len1 + len2)，空间复杂度：O(len2)（栈+Map的空间）
Nature, Published online: 25 February 2026; doi:10.1038/d41586-026-00294-5
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A young woman who is battling against social media giants took the stand Thursday to testify about her experience using the platforms as she was growing up, saying she was on social media “all day long” as a child.，推荐阅读搜狗输入法2026获取更多信息