string(243) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=cpa%E5%8F%AA%E5%90%AC%E7%BD%91%E8%AF%BE%E4%B8%8D%E7%9C%8B%E6%95%99%E6%9D%90 => Failed to connect to 101.89.117.144 port 38022: Connection refused"
cpa只听网课不看教材
