2. 外语
  3. Common cold is a viral infection that starts in the upper respiratory tract, sometimes spreads to the lower structures, and may

Common cold is a viral infection that starts in the upper respiratory tract, sometimes spreads to the lower structures, and may

admin2015-06-27  42
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 the 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.
Which of the following is NOT a treatment to cold?
选项 A、More rest.
B、Drink enough water.
C、Take antibiotics.
D、Stay indoors more.
答案D
解析 根据关键词treatment定位到最后一段。本段列举了几个治疗感冒的方法。其中，[A]和[C]项都是对原文的重复；[B]是对adequate fluid intake的同义转述；[D]项在文中有提及，但是，“大部分时间待在室内”是引起感冒的一个主要原因，而不是治疗方法。所以，本题答案为[D]。
转载请注明原文地址:https://kaotiyun.com/show/HmXK777K
0

专业英语四级

相关试题推荐
随机试题
最新回复(0)