this.stack = []; // 核心：存储索引，保证索引对应的价格单调递减
The last decade hasn’t been smooth. Brewster rattles off challenges: tariffs on equipment and consumables sourced from China, Europe, Mexico, and Canada; price hikes on vinyl and paper; labor shortages; and SBA lending issues layered on top of the whiplash of COVID, when only “necessary businesses” were allowed to stay open.
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第三十三条 居民委员会应当实行少数服从多数的民主决策机制和公开透明的工作原则，建立健全各种工作制度。