string(243) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=a%E8%82%A1%E6%9C%80%E9%AB%98%E6%8D%A2%E6%89%8B%E7%8E%8760%E4%BB%A5%E4%B8%8A => Failed to connect to 125.88.227.171 port 38114: Connection refused"
a股最高换手率60以上
