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
25
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
AtarecentdebateinWashingtonabouttheriseofChina,aU.S.careerdiplo
Communicationisfarmorethanspeechandwriting.Mostofusareawaretha
HowtoUseTechnologytoMakeYouSmar
Tokyoisoneofthemostconfusingcitiesintheworld.Over20millionspe
由于设计变更或其他情况,往往会产生工程量的变化。()应根据劳务净需求的新增(减
目前,我国公募证券投资基金全部是( )。A.封闭式基金 B.股票基金 C.
治疗热病烦渴和胃热呕逆的药物是A.石膏 B.夏枯草 C.知母 D.
你们公司新财务制度运行良好,但是外地部门负责人却说手续繁多,牢骚不停。如果你是财
目前我国银行开办的外币存款业务币种包括()。A:英镑 B:卢布 C:新加坡元
地处西南某企业35kV电力用户具有若干10kV变电所。所带负荷等级为三级,其供电
最新回复
(
0
)