string(256) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%80%E9%80%A0%E8%AE%A1%E4%BB%B7%E6%95%99%E6%9D%90%E6%94%B9%E5%8A%A8%E4%BA%86%E5%90%97 => Failed to connect to 14.18.117.71 port 38164: Connection refused"
一造计价教材改动了吗
