Stress makes a person want to stop whatever they are doing,try t

Stress makes a person want to stop whatever they are doing,try to relax,and become calm again．Too much stress results in physical,emotional,and mental health problems. There are numerous physical effects of stress．Stress can affect the heart．It can increase the pulse rate,make the heart miss beats,and can cause high blood pressure．Stress can affect the respiratory system．It can lead to asthma．It can cause a person to breathe too fast,resulting in a loss of important carbon dioxide．Stress can affect the stomach．It can cause stomach aches and problems digesting food．These are only a few examples of the wide range of illnesses and symptoms resulting from stress. Emotions are also easily affected by stress．People suffering from stress often feel anxious．They may have panic attacks．They may feel tired all the time．When people are under stress,they often overreact to little problems．For example,a normally gentle parent under a lot of stress at work may yell at a child for dropping a glass of juice．Stress can make people angry,moody,or nervous. Long-term stress can lead to a variety of serious mental illnesses．Depression,an extreme feeling of sadness and hopelessness,can be the result of continued and increasing stress．Alcoholism and other addictions often develop as a result of overuse of alcohol or drugs to try to relieve stress．Eating disorders,such as anorexia,are sometimes caused by stress and are often made worse by stress．If stress is allowed to continue,then one's mental health is put at risk. It is obvious that stress is a serious problem．It attacks the body．So,reduce stress:stop the world and rest for a while. Stress can affect the respiratory system by__.
A、decreasing the pulse rate
B、a loss of carbon dioxide
C、causing breathing problems
D、causing asthma
【正确答案】：C
【题目解析】：根据给出的段落内容，我们可以找到关于压力对呼吸系统的影响的描述。段落中提到：“Stress can affect the respiratory system. It can lead to asthma. It can cause a person to breathe too fast, resulting in a loss of important carbon dioxide.” 这里明确指出了压力可以导致呼吸问题，如哮喘和呼吸过快导致的二氧化碳丢失。 然而，我们要找到一个最直接描述压力如何影响呼吸系统的选项。 A选项“decreasing the pulse rate”提到的是脉搏率下降，但文中提到的是脉搏率增加，所以A选项不正确。 B选项“a loss of carbon dioxide”虽然文中提到，但它是由于呼吸过快导致的后果，而不是压力直接影响呼吸系统的方式，所以B选项不是最直接的原因。 C选项“causing breathing problems”是一个更广泛的描述，涵盖了压力导致的所有呼吸问题，包括呼吸过快和哮喘。这是一个准确的总结，因为文中确实描述了压力可以导致呼吸问题。 D选项“causing asthma”虽然文中提到，但它只是压力导致的呼吸问题之一，不是全面的描述，所以D选项不如C选项全面。 因此，正确答案是C：“causing breathing problems”。