(3) The last section, the ileum is attached to the large intestine.

（3）最后一部分的回相连。

And finally at the end, running into the large intestine is the ileum, where important vitamins like A, B12, E, D, and K are absorbed.

最后，进入的是回，重要的维生素 A、B12、E、D 和 K 在回中被收。

As more gastrointestinal tissue is damaged, patients might experience pain in the affected areas, most commonly in the right lower quadrant which is associated with the ileum.

随着胃道组织损伤的加重，患者可能会在受损区域感到疼痛，最右下腹，是回的体表投射部位。

The third section is called the ileum, and it has tight intercellular junctions, allowing it to efficiently absorb fluid and begin concentrating the intestinal contents.

第三部分为回，有紧密的细胞间链接，使得回可以高效地收液体，浓缩内容物。