回复：请教各位老师同学：父母探亲延期的问题。

最近签证延期容易批准吗?申请延期被拒的可能性大不大？
You can't apply for visa extension but can apply for extension for your stay in the U.S.

如果在I-94到期前回国，然后在明年二月份签证expire 前再来美国，会不会因为在国内停留时间太短而不能再进入美国？这方面有在国内必须居住多长时间才能再次来美国的具体要求吗？
As a non immigrant, you should spend more time in your home country. You better have a very good reason to tell CBP on why you need to come back so soon.