A positive learning attitude can not only improve the quality of study but also lay a good foundation for lifelong learning.

积极的学习态度不仅能提高学习的质量，而且能为终身学习打下良好的基础。

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Another American study says obesity has become as great a threat to quality of life as smoking.

VOA: special.2010.01.13

City College of New York professor Erica Lubetkin is one of the authors of a new study that looked at the loss of quality life years due to obesity and how that changed between 1993 and 2008.

VOA: standard.2010.08.10

But at least one of the companies' outside experts said Friday that the data quality of the study was similar to that of other trials.

FORBES: New Vytorin Report Draws Fire

More than a third of the nation's 12.6 million cancer survivors had physical or mental health problems that put their overall health in jeopardy and had a negative impact on their quality of life, according to a recent study of federal health data funded by the National Cancer Institute.

WSJ: Rehab for Cancer Survivors

In the Archives of Internal Medicine, a study asked if a better quality of death takes place when per capital cost rise.

FORBES: Why 5% of Patients Create 50% of Health Care Costs