Michael returned to Silicon Valley where, following a brief run at social media analytics company Klout, he joined Uber in 2013 as chief business officer and a close lieutenant to CEO Travis Kalanick. Over the next four years, he helped orchestrate one of the most aggressive expansions in corporate history, in which Uber raised nearly $15 billion and saw its valuation soar to roughly $70 billion.
（五）无正当理由大量持有非本人注册的网络账号的；
。服务器推荐是该领域的重要参考
async function checkEndpoint(url) {
3️⃣ 堆排序 (Heap Sort)