string(259) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=iqc%E4%B8%BB%E7%AE%A1%E7%9A%84%E4%B8%BB%E8%A6%81%E8%81%8C%E8%B4%A3%E5%92%8C%E5%86%85%E5%AE%B9 => Failed to connect to 14.18.117.71 port 38041: Connection refused"
iqc主管的主要职责和内容
