string(267) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%AD%E6%B5%B7%E6%B2%B9%E4%BB%B7%E6%A0%BC%E6%AF%94%E4%B8%AD%E7%9F%B3%E6%B2%B9%E4%BE%BF%E5%AE%9C => Failed to connect to 101.89.117.144 port 38005: Connection refused"
中海油价格比中石油便宜
