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The shu-stream point (also known as the yuan source point) for the spleen meridian is SP 3. This point is significant in Traditional Chinese Medicine as it serves multiple functions, including the ability to tonify the spleen and support digestion. It is located on the medial side of the foot, just proximal to the first metatarsophalangeal joint, making it an accessible point for treatment.

In the context of the spleen meridian, SP 3 not only plays a key role in nourishing the spleen and harmonizing its energy but also helps with the flow of qi and blood in the body. Its characterization as a shu-stream point means it is effective for the disorders associated with the organ it corresponds to, in this case, the spleen.

The other points listed, such as those associated with the heart meridian (HE 9 and HE 3) and SP 1, do not serve the same specific function as the shu-stream point on the spleen meridian, thereby affirming SP 3’s unique role in tonifying and regulating spleen energy.