With my laptop, there's somehow only the quotes above, so "example".
If I quote, they must be at the beginning below and in the end above or? I also find no attitude in open office writer.
This is because the original ASCII character encoding only supports the English standard (this is also true on the typewriter).
Incidentally, correct quotes also look different than "." In fact, they are in italics, have the shape of a comma (hence "apostrophe"), and differ in direction depending on whether it is the introductory or final sign.
However, today's editors and word processing programs can automatically make the so-called "double quotes" the so-called typographic quotes (which in Germany actually correct).
The difference you can see very nice, if you open in Windows, for example, the program "Character Map" and then under "Group by" the value "Unicode sub-range" and then in the small additional window "General Interpunkionszeichen".
You also have quotes below, either under Accessories, System Tools, Character Map, or you can find that in a writing program (Word, open office) under icon and set as "default".
There are language-specific standards that you should not break without necessity. In "English" you put 66-up in the front and 99 in the back (not the same thing twice!), In the "German" comes 99-down in the front and 66-up in the back, 99 in the "Dutch" and 99-up in the "Dutch" and "Finnish" takes 99-up both times. Sometimes the "German" also uses the pointed brackets (chevron), in the "Switzerland" the other way around as well as in French (guillemet, but there's empty space to the text), but that's what you do in novels, not in scientific papers.
You are responsible for the correct operation of your computer. If the operating system does not give you access to these characters, then read the documentation of your text sentence program, which usually have some tricks and options ("smart quotes"), as they automagically from the typed "convert.
