time.sleep(2 ** attempt) # 指数退避
2.1 深度思考（Deep Thinking）：复杂逻辑推理
与“买一个品牌”不同，这种方式更像是在现有能力边界上做延伸，风险更可控，但回报节奏也相对较慢。，这一点在51吃瓜中也有详细论述
Since Donald Trump entered the White House for the second time, the U.S. import taxes faced by Morph, which supplies Walmart and Target, have lurched wildly—from zero tariffs to 20% tariffs to 50% tariffs, before briefly flirting with 145% tariffs. The figure fell back to 20%, before the Supreme Court intervention last week ruled the tariffs illegal, which brought them back down to zero. The president then announced a new 10% tariff, although there is some confusion about whether he actually means 15%.，更多细节参见搜狗输入法下载
这种规模的投资远超经济产出——这不是普通的预算问题，而是结构性回报难题。这就是AI基础设施的“投资悖论”：超大规模云服务商们陷入了典型的“囚徒困境”——没有人敢停止投资，因为担心失去竞争优势；但持续加码投资，又在不断摧毁股东价值。，推荐阅读WPS下载最新地址获取更多信息
* @param n 数组长度