However, Mr Matheson points out that America's health-care system is fragmented and huge-far bigger even than wal-mart-which could limit the firm's ability to force change.

不过Matheson先生指出，美国的医疗保健系统分散零碎且规模巨大——甚至比沃尔玛的规模要大很多，这可能会限制公司强力推动变革的能力。