共 
電子是一種帶有負電的次原子粒子，通常標記為 e − {\displaystyle e^{-}\,\!} 。電子是第一代輕子，以重力、電磁力和弱核力與其它粒子交互作用。輕子是構成物質的基本粒子之一，無法被分解為更小的粒子。電子帶有1/2自旋，是一種費米子，根據包立不相容原理，任何兩個電子都不能處於同樣的量子態。電子的反粒子是正子，其質量、自旋、帶電量大小都與電子相同，但是電量正負性與電子相反。電子與正子會因碰撞而互相湮滅，並在這過程中，生成一對以上的光子。 
維基百科The theme of Book Four is “ In the hospital”
It is showed in different conversations occurred in various possible events in daily living. The contents are : “To register at a hospital”, “ To see a doctor”, “To get the medicine”, “To be hospitalized”, ”In a nursing station”, “To visit the sick”, “Discharge from a hospital”, “An accidental injury”,”In the emergency room”,”Comprehensive physical checkup”.
People in the stages of life have to go through birth, muturation and old age, disorders and death. “In the hospital” helps foreigners understand the cultures of various and the taboos in a hospital .
本冊的主題是「在醫院」。是從不同角度將日常生活中可能遇到的情形，以話題的形式呈現。內容有：掛號、看病、領藥、住院、護理站、探病、出院、意外受傷、急診室、健康檢查等十個單元。
生老病死是人生必經之事，本冊以「在醫院」為主題，幫助外籍朋友，瞭解華人對「醫院」的不同習慣與種種忌諱。
光碟圓標文案
100堂中文課 100 Units Chinese
在醫院In the Hospital
To register at a hospital
To see a doctor
To get the medicine
To be hospitalized
In a nursing station
To visit the sick
Discharge from a hospital
An accidental injury
In the emergency room
Comprehensive physical checkup
