By Chris Prentice and Danilo Masoni WASHINGTON/MILAN (Reuters) -U.S. shares fell on Tuesday and European stocks extended losses for a third session as investors warily awaited U.S. tech earnings and worries over global growth lingered. China’s COVID-19 curbs and fears of aggressive U.S. Federal Reserve tightening continued to damp risk appetite and lifted the dollar to new two-year highs. Oil prices rebounded in volatile trading and gold prices rose on safe-haven buying. The tech-heavy Nasdaq led Wall Street lower. The Dow Jones Industrial Average fell 621.54 points, or 1.83%, to 33,427.92, th…