string(278) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%80%E5%8F%AA%E8%82%A1%E7%A5%A8%E5%89%8D%E9%9D%A2%E5%8A%A0xd%E6%98%AF%E4%BB%80%E4%B9%88%E6%84%8F%E6%80%9D => Failed to connect to 101.89.117.144 port 38005: Connection refused"
一只股票前面加xd是什么意思
