回複：正準備B2，還想請教2個問題：

1.如果B2被拒，那個30天離境和現在這個180天離境的要求是不是一樣性質的呢？還是那個30天離境的製約更強？如果我30天後不走，是不是和現在不走是一樣的stay illegeally? (我現在的i-94已經過期了，是不是和其他人在i-94過期前遞交轉身分的情況不同呢？)
-When you are out of status, you are suppose to leave U.S, no matter one day or 179 days. But if you do not leave after unlawful presence > 180 days, you can not get your GC using EB category within U.S. Also, if you leave U.S., you will be banned entry into U.S. within 3 years. So, unlawful presence >180 days is very serious.

2.不論是否申請B2，將來簽證官都會立即查到我逾期離境的問題？
-It is possible. But in your case, because your health can not allow you to leave U.S., the VO may issue the visa to you as long as you leave U.S. before your unlawful presence > 180 days.

I do not think you need to worry this kind of issue by this time. Just go ahead to do what you are supposed to do, and let God decide the future.