string(286) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%BE%8E%E5%9B%BD%E9%9E%8B%E7%A0%817.5%E7%9B%B8%E5%BD%93%E4%BA%8E%E4%B8%AD%E5%9B%BD%E5%A4%9A%E5%A4%A7%E7%A0%81%E5%91%A2 => Failed to connect to 14.18.117.71 port 38164: Connection refused"
美国鞋码7.5相当于中国多大码呢
