You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "where does absorption occur in the small intestine?" whose answer is ileum.
Each document should contain about 30 words, and these documents should contain useful information.

Query: where does absorption occur in the small intestine
Useful Output:

Doc 1: The final products of digestion are absorbed from the digestive tract, primarily in the small intestine. There are two different types of
Doc 2: Ileum, the final and longest segment of the small intestine. It is specifically responsible for the absorption of vitamin B 12 and the reabsorption of
Doc 3: Absorption of digested food occurs mainly in the small intestine because its wall consists of many finger-like projections called villi.
Doc 4: Duodenum, the first part of the small intestine, which receives partially digested food from the stomach and begins the absorption of nutrients.
Doc 5: Almost all ingested food, 80 percent of electrolytes, and 90 percent of water are absorbed in the small intestine. Although the entire small