string(285) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E8%8B%B9%E6%9E%9C%E6%9C%89%E9%94%81%E5%92%8C%E6%97%A0%E9%94%81%E5%8C%BA%E5%88%AB%E7%99%BE%E5%BA%A6%E7%99%BE%E7%A7%91 => Failed to connect to 101.89.159.206 port 38100: Connection refused"
苹果有锁和无锁区别百度百科
