U.S. employers added a better-than-expected 266,000 jobs in November in a sign the economy continues to power ahead.The unemployment rate dipped to 3.5%. Job gains for the two previous months were revised up by a total of 41,000. “It’s a tremendous report,” said White House economist Tom Philipson. “Obviously, it’s something to be very happy about.” The overall jobs number got a boost from the roughly 41,000 people who returned to work, after being idled in October by the United Auto Workers strike at General Motors. Manufacturing added a total of 54,000 jobs, even though factory activity has declined in each of the past four months.