首页
登录
职称英语
Common cold is a viral infection that starts in the upper respiratory tract
Common cold is a viral infection that starts in the upper respiratory tract
游客
2024-10-24
30
管理
问题
Common cold is a viral infection that starts in the upper respiratory tract, sometimes spreads to the lower structures, and may contribute secondary infections in the eyes or middle ears. The main differences between the common cold and other respiratory infections are the absence of fever and the relative mildness of the symptoms.
About 200 different strains of virus are capable of producing colds. Frequently two or more different viruses can be isolated during a single episode. The cold is spread by person-to-person contact. People can carry the virus and communicate it without themselves experiencing any of the symptoms. Incubation is short--usually one to four days. The viruses start spreading from an infected person before the symptoms appear, and the spread reaches its peak during the symptomatic phase. The incidence of colds peaks during the autumn, and minor epidemics commonly occur throughout the winter. The reason for this incidence is unknown; it may not stem mainly from stresses imposed by chilly weather but rather result from the greater amount of time spent indoors, which increases the likelihood of close contact with those persons carrying cold viruses.
Pathologic changes occurring in the mucous membrane that lines the nose, the nasal sinuses, the nasoharynx, and other upper respiratory passages may include tissue swelling, congestion of blood, and oozing of fluids. During the acute phase of the disease, the respiratory secretions are altered by increase in serum proteins. Parts of cells may also be found in tile fluids. Tissue repair is rapid and seems complete, although a relationship might exist between colds and more serious respiratory conditions.
Cold symptoms vary from person to person, but in the individual the same symptoms tend to recur in succeeding bouts of infection. Manifestations may include sneezing, headaches, fatigue, chilling, sore throat, inflammation of the nose (rhinitis), and nasal discharge. There is usually no fever. The symptoms usually last for only a few days. The nasal discharge is the first warning. The secretions become watery, clear, and excessive. Later, they thicken, increase in mucus and pus content, and may colour a yellow-green, with traces of blood. Coughing can be dry or produce amounts of mucus. Other more serious diseases with similar general symptoms may be mistaken for a cold; some of these are tuberculosis, bronchitis, lung abscesses, and inflammation around the heart.
Treatment is, in most instances, directed toward allaying of symptoms, coupled with rest and adequate fluid intake. Occasionally antibiotics are given to prevent secondary infections. [br] It seems that the person ______ is most likely to catch cold.
选项
A、having a mild fever for a few days
B、carrying viruses capable of producing colds
C、spending most of his time indoors
D、spending most of his time outdoors
答案
C
解析
第二段最后一句“(冬天)感冒发生的原因还不清楚;感冒的主要原因可能不是因为严寒的天气,而是由于大部分时间呆在室内,增加了与携带感冒病毒的人亲密接触的机率”,由此可知,答案为C 。选项 A 、B 和D 均与上下文意思不符。
转载请注明原文地址:https://tihaiku.com/zcyy/3814721.html
相关试题推荐
Itisquitecommonforaworkingmantomake______forhisoldagebyputtinga
Thetiesthatbindustogetherincommonactivityareso______thattheycandi
Commoncoldisaviralinfectionthatstartsintheupperrespiratorytract
Commoncoldisaviralinfectionthatstartsintheupperrespiratorytract
Commoncoldisaviralinfectionthatstartsintheupperrespiratorytract
Hetriedto______totheviewofthepublicmoredistinctlythaniscommonlydo
Itiscommonknowledgethatabilitytodoaparticularjobandperformance
Let’sforgetourdifferencesandseekcommonground,______we?A、willB、shallC、
Stressisawordcommonlyfoundintoday’svocabulary,andisoftenusedto
Stressisawordcommonlyfoundintoday’svocabulary,andisoftenusedto
随机试题
ShoppersonBlackFriday,thetraditionalstartoftheholidayshoppingseas
审计师审核了退休福利金计划,确认过去十年间养老金和医疗福利发生过多次变化。审计师
关于内部评级法和内部评级体系,下列说法错误的有( )。A.内部评级法是风险计量
患者,女性,78岁,因大叶性肺炎高热卧床。护士为其进行床上擦浴时,下列顺序正确的
下列不属于股利贴现模型的是( )。A.零增长模型 B.不变增长模型 C.多
A.动脉导管未闭 B.房间隔缺损 C.肺动脉狭窄 D.法洛四联症 E.室
学校教育对个体发展的影响具有即时价值但不具有延时价值。
李老师认真学习《幼儿园教师专业标准(试行)》,并制定了自己的专业发展规划。李老师
()把客户分成不同的细分市场,提供不同的产品和不同的服务,但又不同于一对一的营
短时记忆的记忆量为( )。A.4±2个组块 B.5±2个组块 C.6±2个
最新回复
(
0
)