// 易错点3：必须先判断stack2.length0，再访问stack2.at(-1)（避免栈空时取到undefined）
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我家孩子，在2岁左右时身高、体重发育逐步跟不上平均水平，看了一遍能看的大夫，最后发现过敏会导致吸收不好影响生长发育，所以测了一下过敏源，发现麸质、鸡蛋有较为严重的过敏。用了大概1年时间调整，可能是孩子大了，免疫力提高了，麸质类食物重新吃了起来，也不会有过敏问题，但鸡蛋12月底刚加回餐食中，算是完成了重要的调理过程。。关于这个话题，91视频提供了深入分析
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Integration between different search modalities is accelerating. Google is bringing AI answers into traditional search results. Bing is integrating ChatGPT-powered features. New platforms are emerging that combine search, AI chat, and traditional browsing in unified experiences. This convergence means optimization strategies must account for hybrid discovery experiences where users might see both traditional results and AI-generated answers, potentially in the same interface.