问一下财产证明的问题

这几天准备办财产证明，本以为把存款冻结三个月就可以了。爸爸妈妈担心说3个月够不够，害怕学校要求冻结更长的时间。我突然发现，学校的要求只是 The amount of financial support you need to show is $47,379 USD for master’s students and $56,019 USD for Ph.D. students.根本没提冻结期限的问题。
附：在网上看到一同学的发帖好像就是存款冻结期除了问题，如下
In reviewing your bank statement, I see that the bank only verifies funds to August 1, 2010.  This date must fall after the first day of classes which is August 19, 2010.”“It is important to list your ASU id number on the bank statement since the account holder's name is different than your name希望大家给些意见，这个是按惯例冻结三个月就可以吗？

冻结到开学以后，怎么交学费啊……不解，关注下……

同路请教~~  哪位同学能 就签证前的 准备 做个全面的说明呢？   谢谢~~

去GTER翻翻帖子就知道了