Question: What does the drop in `一、` mean?

![enter image description here](https://i.stack.imgur.com/41gLs.jpg)

Answer: 
While we're on this topic, you should also get used to:

《》 are equivalent title marks

那部电影的名字是《红高粱》: The title of that movie is Hong Gao Liang (Red Sorghum).

『...』 are quotation marks. 

If you're reading verticle text, use this as quotation marks:

﹁

.
.
.

﹂
It's a comma, and it serves the same purpose as a colon in English. Somewhere further down in this lesson you'll see a 二 with a similar comma, followed by a heading, maybe 词汇.