Ruby gem 安装 sass 错误

Ruby gem install sass error

我想安装 sass,我遇到了与 相同的问题。这是我尝试获取资源时得到的结果:

C:\Ruby22-x64>gem sources -a http://rubygems.org/
https://rubygems.org is recommended for security over http://rubygems.org/

Do you want to add this insecure source? [yn]  y
Error fetching http://rubygems.org/:
        too many connection resets (http://rubygems.global.ssl.fastly.net/specs.4.8.gz)

我该怎么办?有没有办法获取资源并手动安装?

我是手动下载安装解决的