Which point is located on the lower leg, described as being two finger-breadths lateral to Tiáokǒu ST-38?

• A. ST 40
• B. ST 41
• C. ST 42
• D. SP 1

Answer: (A)

The main idea here is locating points by their distance from a known reference on the leg along the St channel. Tiáokǒu ST-38 sits on the lower leg, and the point two finger-breadths lateral to ST-38 is ST-40, the Luo-connecting point of the St channel. This places it on the lower leg, not on the foot or toes. The other options are on the foot or toe area (ST-41 and ST-42 on the dorsum of the foot; SP-1 on the big toe), so they don’t fit the described position. Therefore, the described location matches ST-40.