经全体合伙人的同意，可以修改或者补充合伙协议，合伙人享有的权利、承担的义务，依照合伙

( )是为确保施工安全有与其要求相适应的人力、物力和财力投入，并发挥其投入效果的保证体系。

A．施工安全投入保证体系

B．施工安全信息保证体系

C．施工安全制度保证体系

D．施工安全技术保证体系

滑膜肉瘤的临床表现包括（）

A.运动缓慢、有轻度疼痛和压痛

B.有时无明显症状

C.肿胀弥漫，局部发红，运动受限

D.发病年龄为青少年

E.单纯切除后复发率高，因而术前应放疗，然后再截肢

皮下气肿最常发生于下列哪种情况（）

A.张力性气胸

B.开放性气胸

C.闭合性气胸

D.自发性气胸

E.胸腔积液

下列哪项不属于地陪在旅游团抵达的前一天必须落实的事项？（）

A.落实旅行车辆

B.掌握联系电话

C.了解不熟悉景点情况

D.问讯飞机抵达准确时间

Disability among the elderly has declined markedly in the United States in the past two decades. In 1984, 25 percent of the elderly population reported difficulty with activities associated with independent living. By 1999, the share had fallen to 20 percent, a decline of one-fifth. Although these basic facts are well known, their interpretation is not clear. Is the reduction in disability a result of improved medical care, individual behavioral changes, environmental modifications that allow the elderly to better function by themselves, or other demographic changes Will the trend continue, or is it time limited What does the reduction in disability mean for years of healthy life and labor force participation

The researchers David Cutler, Mary Beth Landrum, and Kate Stewart focus on disability caused by cardiovascular disease to investigate the role of improved medical care on reductions in disability. By looking at just one condition, they can analyze health shocks and their outcomes in some detail. Cardiovascular disease is a natural condition to analyze, because it is the most common cause of death in the United States and most other developed countries. Also, more is spent on cardiovascular disease than on any other condition, clearly a case where medical care could really matter.

The researchers measure disability as the presence of impairments in. Activities of Daily Living (ADLs) and Instrumental Activities of Daily Living (IADLs). Their data source, the National Long-Term Care Survey(NLTCS) , includes information on six ADL measures: eating, getting in or out of bed, walking around inside, dressing, bathing, and getting to or using the toilet. There are also questions about eight IADL measures: doing light housework or laundry, preparing meals, shopping for groceries, getting around outside, managing money, taking medications, and making telephone calls. The NLTCS is a nationally representative longitudinal survey of the health and disability profile of the population aged 65 and over.

Cutler and his co-researchers find that reduced disability associated with cardiovascular disease accounts for a significant part of the total reduction in disability--between 14 and 22 percent. The evidence suggests that improvements in medical care, including both increased use of relevant procedures and pharmaceuticals, led to a significant part of this decline in disability. Regions with higher use experienced substantial reductions in mortality and disability.

While precise data on the implications of reduced disability are lacking, the possible impact of disability reductions is staggering. The researchers estimate that preventing disability after an acute cardiovascular event can add as much as 3.7 years of quality-adjusted life expectancy, or perhaps $ 316,000 of value. The cost of this outcome is significantly smaller. The initial treatment costs range from $ 8,610 to $ 16,332, depending on the procedure used. Further, recent cost analyses reported that annual Medicare spending was lower for the non-disabled than the disabled, which suggests that higher treatment costs may be offset by lower future spending among a more healthy population. By virtually any measure, therefore, the researchers conclude that medical technology after acute cardiovascular episodes is worth the cost.

According to the researchers, reduced disability（）

A. is the result of deeline in cardiovascular disease

B. can be realized by increased use of pharmaceuticals

C. is due to improved medical care

D. is mainly caused by improved procedures