请分析和比较热导检测器（TCD）和火焰电离检测器（FID）的设计和工作原理的区别。
逐点列出他们的优点缺点和特点，可简要画图
下面是英文原题
Compare the design and operation of the following two commonly used detectors used in gas
chromatography: (a) the thermal conductivity detector (TCD) and (b) the flame ionization detector. Use
simple sketches to illustrate their principles of operation and a point-by-point list to summarize the
advantages and features of each. Which of these detectors would you place at the end of a capillary
column, and why? Which should only be used with a packed column?
跪谢！！！！
逐点列出他们的优点缺点和特点，可简要画图
下面是英文原题
Compare the design and operation of the following two commonly used detectors used in gas
chromatography: (a) the thermal conductivity detector (TCD) and (b) the flame ionization detector. Use
simple sketches to illustrate their principles of operation and a point-by-point list to summarize the
advantages and features of each. Which of these detectors would you place at the end of a capillary
column, and why? Which should only be used with a packed column?
跪谢！！！！
