nginx+nodejs？

下面这个第一个location是把http://localhost:1337/gek/转给<爱尬聊_百科知识大全>node处理
那下面第二个location是干吗的，是处理后端传过来的接口吗？
不太明白!!!

server {listen 80;server_name gek.show.com; location / { proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header X-Real-IP $remote_addr; proxy_set_header Host $http_host; proxy_pass http://localhost:1337/gek/; }location ~ ^/okc/rest{ proxy_store off; proxy_redirect off; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header X-Real-IP $remote_addr; proxy_connect_timeout 600; proxy_read_timeout 600; proxy_send_timeout 600; proxy_set_header Host "gek.show.com";#proxy_pass http://gek.show.com; proxy_pass http://gek.show.com:8080; } }