which airport is more convenient for a person who will use public transportation and taxi only during the trip, Newark Liberty Intl airport, or JFK airport?
纽约的三个机场都有便捷的公共交通及出租车；拉瓜迪机场离曼哈顿最近（离新唐人街法拉盛更近），JFK次近，Newark最远。不过从那个机场抵达或出发主要看你选择的航空公司是什么。
Which airport is safer and has few delays?
不清楚。
I am thinking to fly to Washington Dc, take bus to New York, then fly back from New York to the bay area.
In Washington DC, which area to book hotel room is more convenient for traveling in the district, to see white house, and the museums?
在DC，以国会为中心点，从北到南画一条线，线以东是黑人区，不要去。尽量选择DC靠西边，靠西北，及西南边的旅馆，从网上看看DC的地铁路线图，选地铁边的旅馆。495号环型公路以外的VA或MD州的旅馆也行，只要在地铁站边上进入DC都很方便。
In New York, which area to book hotel room is convenient, safe and economical to travel to Time square, wall street, museums, book Broadway ticket.
曼哈顿的旅馆都不便宜，稍好的旅馆在$300以上，中档的300-150，低档的150-100（都是税前价，纽约税很高）。你可以考虑住法拉盛的华人家庭旅馆，一般都是$60。自己去Google下吧。
also, to see the statue of Liberty, what kind of trip or transportation to use? Is it allowed to go up the statue? Or, can only take cruise?
从曼哈顿去自由女神是到曼哈顿最南面的炮台公园坐渡轮。最好是先到网上把轮渡票买了，坐渡轮前直接到售票口拿票，否则光买票就起码耗你一小时。如果非要上自由女神额头里，你一大早就得去炮台公园单独买票，这票每天限量发售，每张票上注明上头的时间，你根据票上的时间去自由女神下排队。细节挺多的，你自己好好看看自由女神公园的网页说明。
