Udit Batra, CEO of MilliporeSigma (a subsidiary of German life sciences giant Merck KgaA), spoke before a crowd of 200 newly naturalized U.S. citizens at the JFK Library earlier this year, where he focused on what people have in common. Batra should know: He has worked and lived on four continents. He recently spoke with Executive Editor Doug Banks about his remarks, his company's growth and how Greater Boston compares to other tech-savvy regions of the world.