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USCIS Policy Manual, Volume 12, Part D, Chapter 3，上麵說：

However, an applicant may overcome the presumption of a break in the continuity of residence by providing evidence to establish that the applicant did not disrupt the continuity of his or her residence. Such evidence may include, but is not limited to, documentation that during the absence:

    The applicant did not terminate his or her employment in the United States or obtain employment while abroad;

    The applicant’s immediate family members remained in the United States; and

    The applicant retained full access to or continued to own or lease a home in the United States.