我是看到移民局下面的条例。这个条例可以解读为提供3个月居住即可, 也有人说是要 在申请前住3个月。 Time as a Resident in a USCIS District or State Most people must live in the USCIS district or State in which they are applying for at least 3 months before applying. A district is a geographical area defined by USCIS and served by one of the USCIS “District Offices.”