再请教一个问题,在欧洲这边申请要提供 Evidence that you have significant ties to the country to which you intend to return at the end of your stay in the United States (This is generally established by evidence of family, professional, property, employment or other ties。在国内弄可能户口本就行了,在这边签怎么办?你当时准备的是什么?