根据上下文填写空白处所需的内容或所提供单词的正确形式，所填写词语不得多于3个单词。
Eating organic food will not make you healthier, according to researchers at Stanford University, although it could cut your ____(expose) to pesticides（杀虫剂）. They looked at more than 200 studies of the content and ____(associate) health gains of organic（有机的） and non-organic foods. Overall, there ____(be) no difference in the nutritional content, although organic food was 30% less likely ____(contain) pesticides.
The researchers looked at 17 studies comparing people who ate organic ____ those who did not and 223 studies ____ compared the levels of nutrients, bacteria, and pesticides in various foods. However, none of the human studies ran for longer than two years, ____(make) conclusions about long-term____(outcome) impossible. And all of the available evidence was____(relative) weak and highly variable, which the researchers said was unsurprising because of all the different variables.
Dr Crystal Smith-Spangler, the lead researcher, said “Some believe that organic food is always healthier and more nutritious. But as ____ matter of fact there isn't much difference between organic and conventional foods, if you're an adult and make decisions based simply on your health.”
