痈的常见致病菌是() A.梭状芽孢杆菌 B.金黄色葡萄球菌 C.溶血性链球菌 D.铜

题型:单项选择题 B1型题

问题:

痈的常见致病菌是()

A.梭状芽孢杆菌

B.金黄色葡萄球菌

C.溶血性链球菌

D.铜绿假单胞菌

E.大肠埃希菌

考点:公卫执业医师临床医学综合临床医学综合题库
题型:单项选择题 B1型题

下列关于大黄法祛胎毒的用法中不正确的是

A.生用大黄

B.只可略煮

C.胎粪通下后停服

D.大便正常者忌用

E.脾虚气弱者勿用

题型:单项选择题 B1型题

实验室保存下列化学试剂的方法有误的是

A.烧碱溶液保存在带橡皮塞的试剂瓶中

B.新制的氯水保存在棕色试剂瓶中

C.少量金属钠保存在煤油中

D.氢氟酸保存在磨口的玻璃试剂瓶中

题型:单项选择题 B1型题

如果该患者小腹灼痛,平时带下量多,色黄质稠,有味,中医辨证为:

A.气滞血瘀

B.湿热下注

C.寒湿凝滞

D.气血虚弱

E.肝肾亏损

题型:单项选择题 B1型题

This week marks the 10th anniversary of the Alar apple scare, in which many American consumers were driven into a panic following the release of a report by an environmental organization claiming that apples containing the chemical Alar posed a serious health threat to preschoolers. The report was disseminated through a PR (Problem Report) campaign and bypassed any legitimate form of scientific peer review. Introduced to the American public by CBS "60 Minutes", the unsubstantiated claims in the report led some school districts to remove apples from their school lunch programs and unduly frightened conscientious parents trying to develop good eating habits for their children.

Last month, Consumers Union released a report warning consumers of the perils of consuming many fruits and vegetables that frequently contained "unsafe" levels of pesticide residues. This was especially true for children, they claimed. Like its predecessor 10 years earlier, the Consumers Union report received no legitimate scientific peer review and the public’s first exposure to it was through news coverage.

Not only does such reporting potentially drive children for consuming healthful fruits and vegetables, the conclusions were based on a misleading interpretation of what constitutes a "safe" level of exposure. Briefly, the authors used values known as the "chronic reference doses", set by the U. S. environmental Protection Agency, as their barometers of safely. Used appropriately, these levels represent the maximum amount of pesticide that could be consumed daily for life without concern. For a 70-year lifetime, for example, consumers would have to ingest this average amount of pesticide every day for more than 25,000 days. It is clear, as the report points out, that there are days on which kids may be exposed to more; it is also clear that there are many more days when exposure is zero. Had the authors more appropriately calculated the cumulative exposures for which the safety standards are meant to apply, there would have been no risks and no warnings.

Parents should feel proud, rather than guilty, of providing fruits and vegetables for their children. It is well established that a diet rich in such foods decreases the risk of heart disease and cancer. Such benefits dramatically overwhelm the theoretical risks of tiny amounts of pesticides in food. So keep serving up the peaches, apples, squash, grapes and pears.

The last month report parallels that on the Alar apple scare in that .()

A. neither really caused worry among the public

B. neither underwent a scientific peer review

C. neither provided statistical supports

D. neither aimed for the public good

题型:单项选择题 B1型题

山海关是华北与东北交通的咽喉要冲。

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