心理学的研究表明：人们往往根据最初的印象对事物作出评价，且这种印象较难改变，这种心理倾向被称为首因效应。充分认识首因效应的作用并加以 Psychological studies have shown that: people tend to make an assessment based on the initial impression of things, and this change is more difficult to change, this psychological tendency is called the first cause effect. Fully understand the role of the first cause effect and add it