我已经安装了 Cygwin_x86，NodeJS 0.8.4，带有节点模块：Yeoman，Grunt-cli。但是当我使用 yo 时，这个 CLI 返回
qiaofu@taobaou3- /cygdrive/c/workspace/test
$ yo
[?] ==========================================================================
We're constantly looking for ways to make yo better!
May we anonymously report usage statistics to improve the tool over time?
More info: yeoman.io/insight.html & http://yeoman.io
========================================================================== (Y/n)
qiaofu@taobaou3- /cygdrive/c/workspace/test
但我不能输入 Y 或 n。