Who says what about the most-discussed articles of Altmetric?

In Altmetrics, tweets are considered as important potential indicators of immediate social impact of scholarly articles. However, it is still unclear to what extent Twitter captures the actual scholarly impact. Therefore, it is necessary to investigate the people who cite the articles and the content of the tweets with attitude towards the articles comprehensively. In this paper, we combine different indicators to identify opinion leaders in the spread of the articles, and use sentimental analysis to quantify the sentimental polarity of tweets. Altmetrics should highlight the positive role of scientific research results to the public, which is more valuable than simple numbers.