latex 图与文字之间的空白过大 段落分段及首行缩进

1.论文中图与文字之间的空白间隙过大，导致排版不大美观。解决方法是在\begin{document}前定义\textfloatsep的长度，例如定义为5pt：

\setlength{\textfloatsep}{5pt}

2.要分段，我们需要使用\par命令，即

This is a line.\par
This is a new line. 

Four score and seven years ago our fathers brought forth on this continent, a new nation, conceived in Liberty, and dedicated to the proposition that all men are created equal. \par
Now we are engaged in a great civil war, testing whether that nation, or any nation so conceived and so dedicated, can long endure. We are met on a great battle-field of that war. We have come to dedicate a portion of that field, as a final resting place for those who here gave their lives that that nation might live. It is altogether fitting and proper that we should do this.
效果：

那么如果我们用断行\来实现的话，即输入为：

Four score and seven years ago our fathers brought forth on this continent, a new nation, conceived in Liberty, and dedicated to the proposition that all men are created equal. \
Now we are engaged in a great civil war, testing whether that nation, or any nation so conceived and so dedicated, can long endure. We are met on a great battle-field of that war. We have come to dedicate a portion of that field, as a final resting place for those who here gave their lives that that nation might live. It is altogether fitting and proper that we should do this.

那么输出会是