string(267) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%B3%A8%E4%BC%9A%E6%98%AF%E7%9C%8B%E6%95%99%E6%9D%90%E8%BF%98%E6%98%AF%E8%BD%BB%E4%B8%80%E5%A5%BD => Failed to connect to 101.89.117.144 port 38056: Connection refused"
注会是看教材还是轻一好
