string(301) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%8B%BC%E5%A4%9A%E5%A4%9A%E8%BF%90%E8%90%A5%E6%A8%A1%E5%BC%8F%E5%AD%98%E5%9C%A8%E7%9A%84%E9%97%AE%E9%A2%98%E6%9C%89%E5%93%AA%E4%BA%9B => Failed to connect to 14.18.117.71 port 38069: Connection refused"
拼多多运营模式存在的问题有哪些
