There is some research to suggest that profile photos can have a useful effect in commercial settings.

有一些研究表明，个人资料照片在商业环境中可以产生有用的影响。

Also in the news this week: New insights into one of the most medically useful effects of cannabis.

本周的新闻还包括：对大麻最具医学意义的作用之一的新见解。