The abstract, keywords and text of the paper need spaces. For text, if your text refers to every paragraph of the text, the first line of the paragraph should be indented by two characters. Some keywords and abstracts of the paper don't need spaces in front, and some need two spaces. It depends on the specific requirements of your school! As for the front of each paragraph of the paper, the first line must be indented by two words. ?

Thesis:

Thesis is a Chinese word, and its pinyin is lùn wén, which is a common word in classical literature and refers to conversation or exchange of ideas. Nowadays, papers are often used to refer to articles that conduct research in various academic fields and describe academic research results, which are referred to as papers for short. It is not only a means to discuss problems in academic research, but also a tool to describe academic research results in academic exchanges. Including academic papers, graduation papers, dissertations, scientific papers, achievement papers and so on.