当研究者实施参与式观察法的时候，研究者需要融入到研究对象的哪些领域之中？
① 生活行为 ② 社会关系 ③ 风俗文化 ④ 居住环境
1.?When the participant observation is carried out, what aspects of the researched person does the researcher need to integrate into ?
① life actions ② social relationships ③ custom and culture ④ environment of accommodation