string(257) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%BD%BB%E5%BA%95%E6%B8%85%E9%99%A4%E7%94%B5%E8%84%91%E5%86%85%E5%AD%98%E5%9E%83%E5%9C%BE => Failed to connect to 101.91.112.32 port 38221: Connection refused"
彻底清除电脑内存垃圾
