string(238) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%BE%8E%E5%85%83%E6%B6%A8%E4%BA%86%E8%BF%98%E6%98%AF%E8%B7%8C%E4%BA%86 => Failed to connect to 61.171.74.35 port 38041: Connection refused"
美元涨了还是跌了
