Illustrations should be used whenever they will simplify, shorten, or make the text easier to understand.
答案解析
解析：
### 题干解析
题干的意思是：插图应该在能够简化、缩短或使文本更易理解的情况下使用。这里的关键词是“简化”、“缩短”和“更容易理解”。
### 选项分析
- **A. 如果能简化、缩短文本或能使文本更容易理解，则应使用插图。**
- 这个选项直接对应了题干的意思，强调了插图的使用条件和目的。它清晰地表达了在什么情况下应该使用插图。
- **B. 应该使用插图，因为插图可以简化、缩短文本，并使文本更易理解。**
- 这个选项虽然也表达了插图的好处，但它的语气更为绝对，似乎暗示无论何时都应该使用插图，而题干并没有给出这样的绝对条件。
- **C. 如果文本复杂、冗长或不易于理解，则应进行解释说明。**
- 这个选项偏离了题干的主题，虽然提到了文本的复杂性，但没有提到插图的使用，反而强调了解释说明，这与题干的重点不符。
### 正确答案
因此，正确答案是 **A**，因为它准确地反映了题干的意思，并且在条件上与题干保持一致。
### 深入理解
为了更好地理解插图的作用，我们可以联想一些实际的例子：
1. **教科书中的插图**：想象一下你在学习生物学，书中有一张细胞结构的插图。
相关知识点：
能简缩易理解就用插图
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