string(278) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=3d%E7%A1%AC%E9%87%91%E5%9B%9E%E6%94%B6%E6%98%AF%E6%8C%89%E6%A0%87%E4%BB%B7%E8%BF%98%E6%98%AF%E5%85%8B%E6%95%B0 => Failed to connect to 101.89.117.144 port 38022: Connection refused"
3d硬金回收是按标价还是克数
