HIGHLIGHTS
- who: pc from the Beijing , Middle School, Beijing, China have published the research: BCP Social Sciences & Humanities ECSS 2022 Volume 19 (2022), in the Journal: (JOURNAL)
- what: Two methods exist in the study of sleep quality, such as subjective PSQI and objective PSG.
- future: The existing research will be summarized to puts forward the prospect of future research.
SUMMARY
Defined as a painful emotion or encounter, loneliness occurs when people's needs for intimacy are not fully met or their social network does not match their preferences in quantity . . .
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