无法安装Ruby的sass gem

Question

我正在尝试安装ruby'gem sass。我先运行Ruby安装，然后： gem install sass。但我得到一个错误：

C：\ Windows \ System32下>创业板安装青菜 错误：无法找到有效的宝石 '青菜'（> = 0）在任何复位器Ÿ

任何想法那可能是什么？

感谢

Update. 
The connad: gem sources --add https://rubygems.org/ fails: 
C:\Windows\system32>gem sources --add https://rubygems.org/ 
Error fetching https://rubygems.org/: 
Errno::ETIMEDOUT: A connection attempt failed because the connected party 
did not properly respond after a period of time, or established connection failed 
because connected host has failed to respond. - connect(2) for "api.rubygems.org" 
port 443 (https://api.rubygems.org/specs.4.8.gz) 

它必须是我们用来访问Internet代理设置。是否有可能让Ruby履行这些设置？

更新2

C:\Windows\system32>gem sources --add 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/: 
     Errno::ETIMEDOUT: A connection attempt failed because the connected part 
y did not properly respond after a period of time, or established connection fai 
led because connected host has failed to respond. - connect(2) for "api.rubygems 
.org" port 80 (http://api.rubygems.org/specs.4.8.gz) 

Answer 1

做

gem sources --add https://rubygems.org/ 

，然后再试一次