根据下列材料请回答 46～50 题： What'S Lacking in“Sicko”? when comes to economic decisions，there are always trade offs(取舍)?Gain 0ne thing and you lose something else._________(46) The central argument of Michael Moore’s movie“Sicko”一that the cure t0 the nation，s health care problems is a single—payer system—is hardly novel and Is certainly worth consideration，whether or not you agree with it.But in comparing the American system with single-payer plans of other countries—Britain，France，Canada and Cuba Mr.Moore left Out the trade-offs，characterizing those countries as health care paradises. ___________(47) Kurt Loder, the film critic who is best known as the anchor(主持人)of“MTV News，”wrole a critique(批评)of the film for MTV’s website.'Sicko，'he said, 'does a real service”in portraying(描绘)victims of American insurance companies’-like the people，who died because their only treatment options were considered“experimental' and therefore not covered._______(48) When' governments attempt to regulate the balance between a limited supply of health care and an unlimited demand for it，they’re inevitably forced to ration treatment’ Mr. Loder asserted.________(49)Mr. Loder cited the short film“Dead Meat，”which presents anecdotes(轶事)of failure In the Canadian single-payer system in its one—sidedness，“Dead Meat'，might have made for a nice double feature with 'Sicko,' and left movie-goers with a more complete understanding Of the complications of deciding on a health care system _____________(50) This all makes an otherwise “emotionally compelling film not necessarily an intellectually satisfying one，”wrote Darren Barefoot，a Canadian blogger. (博各作者).