string(265) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=pos%E6%9C%BA%E6%89%8B%E7%BB%AD%E8%B4%B9%E8%B4%B9%E7%8E%87%E6%80%8E%E4%B9%88%E7%AE%97%E7%9A%840.55 => Failed to connect to 101.89.117.144 port 38208: Connection refused"
pos机手续费费率怎么算的0.55
