下列各句中加横线的成语使用不恰当的一句是（）
Section B
Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You should decide on the best choice.
Crippling health care bills, long emergency-room waits and the inability to find a primary care physician just scratch the surface of the problems that patients face daily.
Primary Care should be the backbone of any health care system. Countries with appropriate primary care resources score highly when it comes to health outcomes and cost. The U.S. takes the opposite approach by emphasizing the specialist rather than the primary care physician.
A recent study analyzed the providers who treat Medicare beneficiaries（老年医保受惠人). The startling finding was that the average Medicare patient saw a total of Steven doctors—two primary care physicians and five specialists—in a given year. Contrary to popular belief, the more physicians taking care of you doesn't guarantee better care. In fact, studies show that increasing fragmentation of care results in a corresponding rise in cost and medical errors.
How did we let primary care slip so far？ The key is how doctors are paid. Most physicians are paid whenever they perform. a medical service. The more a physician does, regardless of quality or outcome, the better he's reimbursed（返还费用). Moreover, the amount a physician receives leans heavily toward medical or surgical procedures. A specialist who performs a procedure in a 30-minute visit can be paid three times more than a primary care physician using that same 30 minutes to discuss a patient's disease. Combine this fact with annual government threats to indiscriminately cut reimbursements, physicians are faced with no choice but to increase quantity to boost income.
Primary care physicians who refuse to compromise quality are either driven out of business or to cash-only practices, further contributing to the decline of primary care.
Medical students are not blind to this scenario. They see how heavily the reimbursement deck is stacked against primary care. The recent numbers show that since 1997, newly graduated U.S. medical students who choose primary care as a career have declined by 50%. This trend results in emergency rooms being overwhelmed with patients without regular doctors.
How do we fix this problem？
It starts with reforming the physician reimbursement system. Remove the pressure for primary care physicians to squeeze in more patients per hour, and reward them for optimally（最佳地) managing their diseases and practicing evidence-based medicine. Make primary care more attractive to medical students by forgiving student loans for those who choose primary care as a career and reconciling the marked disparity between specialist and primary care physician salaries.
We are at a point where primary care is needed more than ever. Within a few years, the first wave of the 76 million Baby Boomers will become eligible for Medicare. Patients older than 85, who need chronic care most, will rise by 50% this decade.
Who will be there to treat them？
The author's chief concern about the current U.S. health care system is______.
A.the inadequate training of physicians
B.the declining number of doctors
C.the ever-rising health care costs
D.the shrinking primary care resources
某保险公司计划推出一项医疗保险，对象是60岁以上经体检无重大疾病的老年人。投保者在有生之年如果患心血管疾病或癌症，则其医疗费用的90%将由保险公司赔付。为了吸引投保者，保险金又不能定得太高。有人估计保险金将不足以支付赔付金，因而会是个赔本生意。尽管如此，保险公司的老总们仍决定推出该项保险。
以下各项断定如果为真，其中哪项最不可能是老总们做出上述决策的依据?
A．题干中的估计只是一种悲观估计，事实上还存在着乐观的估计。
B．推出这种带有明显折赔风险的险种，有利于树立保险公司的道义形象和信誉，而这有利于开拓更大的保险市场。
C．随着全民健身的普及，中老年人中癌症和心血管疾病的发病率呈逐年下降的趋势。
D．随着相关科研的深入和医疗技术的提高，对癌症和心血管疾病的检测和医治近年内将会出现突破性的进展。
下列各句中加横线的成语使用不恰当的一句是（）
A.这对老朋友分别了近半个世纪，没想到这次居然在大街上萍水相逢，于是站在路边畅谈起来。
B.看到马戏团中小丑的这种滑稽表情，坐在旁边的一名外国记者突然忍俊不禁了。
C.参加保险虽不能使人化险为夷，但却能在灾祸不期而至时，使投保者或受惠人得到一笔赔偿，尽量减少损失。
D.这篇讲话，从更深刻的层面明确地提出了当前反腐倡廉、整顿党风的重要性，确有振聋发聩的作用。