呵呵，各地的要求居然不一样。。看华盛顿的

A letter from your insurance company : stating that you will be covered outside the United States, for a coverage of at least $ 40.000, （您的旧帖，纽约市45000）
Fundings for the trip and personal finances :

8226;for tourists and visitors : 3 last months bank statements, ALL bank accounts (checking, saving, money market…) you own or share in the US, with detailed transactions history and daily balance (+ 1 copy). Bank statements must show the name and address of owner(s). An electronic print out update of each bank account,s from the last statement up to the day of your appointment at the visa section, may be required. 100 dollars per day of stay are suggested. Bank accounts are subject to detailed review. Any incoming or outgoing transaction may be subject to inquiries and information. Corporate bank account or companies financial guarantee for tourism or private visits will not be accepted.