内存价格的波动周期已缩短至历史最短，甚至出现一个月内二次调价的极端情况。这种高频波动迫使手机厂商不得不采取动态定价策略。
def _extract_text(node) - str:
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据报道，广东、广西、福建等地“地贫”基因携带率较高，其中广西的地中海贫血基因携带率为20%。福建省人民政府官网曾专门发布地贫科普内容，其中明确界定：“轻型地贫即地贫基因携带者，无明显地贫相关症状”，清晰区分了“基因携带”与“临床患病”的差异。