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华盛顿的GENERAL INFORMATION GeographyLocated midway along the eastern seaboard of the United States, south of Maryland, north of Virginia and 233 miles south of New York City, the Washington, DC metropolitan area refers to the District of Columbia, plus 7 Maryland counties (Anne Arundel, Calvert, Charles, Frederick, Howard, Montgomery and Prince George's), 5 Virginia counties (Arlington, Fairfax, Loudon, Prince William and Stafford) and 6 Virginia cities (Arlington, Alexandria, Fairfax City, Falls Church, Manassas and Manassas Park).The District of Columbia is 67 square miles and is divided into 4 quadrants: Northwest, Southwest, Northeast and Southeast. The U.S. Capitol building marks the center where the quadrants meet. Numbered streets run north and south. Lettered streets run east and west (there are no J, X, Y or Z streets), becoming two-syllable names, then three-syllable names as you travel farther out from the center. Avenues named for US states run diagonally, often meeting at traffic circles and squares.ElevationHighest is 420 feet; lowest is sea level.PopulationThe population is approximately 572,000 in Washington, DC proper and 5.4 million for the entire metro area.For more information, go to the U.S. Census Bureau.IndustryWashington DC's primary industry after the federal government is tourism. Other important industries include trade associations, as Washington, DC is home to more associations than any other US city; law; higher education; medicine/medical research; government-related research and publishing. The Washington, DC metropolitan area is also world headquarters for corporations such as USAirways, Marriott, Amtrak, Gannett News, Mobil Oil, MCI Telecommunications and the International Monetary Fund.ClimateExperience the glory of all four seasons here in Washington, DC. Warm weather usually prevails from April until as late as October. Winters are short here, with more rain than snow. Monthly high and low average temperatures follow没了