已知条件：
1.07.8-09.1.1的申请人数>09.1.1-10.1.1的申请人数
2.new filings for adjustment of status in recent months has been extremely
low
令A = total received filings from 07.8-09.1.1
令B = total received filings from 09.1.1-10.1.1
假设：extremely low意味着 A<= 0.5 * expected inventory amount
推理：
条件1=> A>B and 假设 => A+B < expected inventory amount =>继续前进
现在的问题就是，这个假设是否可靠？！是太保守了？还是太乐观了？还是适中。
我个人觉得，O向来保守，所以这个假设可能是保守了，所以推理应该成立。
欢迎批评指正。
