Sign up for The Brief, The Texas Tribune’s daily newsletter that keeps readers up to speed on the most essential Texas news. RALLS — On a map, this small town in the South Plains seems well positioned for residents to find health care. With nearly 1,700 residents, Ralls is nestled between Crosbyton, about 10 miles away, and Lubbock, about 30 miles away, both of which have hospitals and emergency rooms. But being neighbors with a larger city has made getting health care harder. With Lubbock quickly growing and in reach, the city has inadvertently sapped patients, physicians and businesses from nearby towns. The result: Everyone in Ralls finds themselves driving…