string(320) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%BE%8E%E5%9B%BD%E5%A6%82%E6%9E%9C%E9%80%80%E5%87%BAqe%E5%88%99%E4%BC%9A%E4%BF%83%E4%BD%BF%E7%BE%8E%E5%85%83%E6%8C%87%E6%95%B0%E5%8D%87%E5%80%BC%E5%90%97 => Failed to connect to 14.18.46.51 port 38206: Connection refused"
美国如果退出qe则会促使美元指数升值吗
