问题
单项选择题 A1/A2型题
常可导致肛瘘的肛门部位手术是（）
A.内痔注射疗法
B.肛裂切除术
C.血栓性外痔切开取栓术
D.肛周脓肿切开（或穿破）
E.内痔环切术
答案
参考答案：D
解析：肛瘘是指肛门周围的肉芽肿性管道，多数是因直肠肛管周围脓肿切开或自行破溃后处理不当而形成的后遗症。
搜题请搜索小程序“爱下问搜题”
常可导致肛瘘的肛门部位手术是（）
A.内痔注射疗法
B.肛裂切除术
C.血栓性外痔切开取栓术
D.肛周脓肿切开（或穿破）
E.内痔环切术
参考答案：D
解析：肛瘘是指肛门周围的肉芽肿性管道，多数是因直肠肛管周围脓肿切开或自行破溃后处理不当而形成的后遗症。
| Smallpox was the first widespread disease to be eliminated by human intervention. A highly contagious viral disease, it was endemic in Europe, causing the death of millions of people until the development of vaccination by Edward Jenner around 1800. In many non- European nations, it remained a dreaded, often fatal illness until very recently. In May 1966, the World Health Organization (WHO), an agency of the United Nations, was authorized to initiate a global campaign to eradicate smallpox. The goal was to eliminate the disease in one decade. At the time, the disease posed a serious threat to people in thirty nations. More than 700 physicians, nurses, scientists, and other personnel from WHO joined about 200,000 health workers in the infected nations to battle the disease. Because similar projects for malaria and yellow fever had failed, few believed that smallpox could actually be eradicated, but eleven years after the initial organization of the campaign, no cases were reported in the field. The strategy was not only to provide mass vaccinations but also to isolate patients with active smallpox in order to contain the spread of the disease and to break the chain of human transmission. Rewards for reporting smallpox assisted in motivating the public to aid health workers. One by one, each smallpox victim was sought out, removed from contact with others and treated. At the same time, the entire village where the victim had lived was vaccinated. By April 1978, WHO officials announced that they had isolated the last known case of the disease, but health workers continued to search for new cases for two additional years to be completely sure. In May 1980, a formal statement was made to the global community. Today smallpox is no longer a threat to humanity. Routine vaccinations have been stopped worldwide. |
The word "they" underlined in Paragraph 4 refers to ______ .
A．health workers
B．officials
C．victims
D．cases