Maybe it’s unsurprising that treatment in rural towns costs less than in big cities, with all their high prices, varied populations, and woes (IN 难,灾难). But there are also significant disparities in towns that are otherwise very similar. How do you explain the fact, for instance, that in Boulder, Colo., the average cost of Medicare treatment is $9, 103, whereas an hour away in FortCollins, Colo. ,the cost is $ 6,4487
"Disparities" most probably means