解答这道初中物理的力学题---**Question Stem:** [例 4] 在图 1-5-6 的四种情境中，人对物体做功的是 ( ) **Chart/Diagram Description and Options:** The image displays four separate scenarios, each with a diagram and a descriptive text. These represent the options for the question. * **Option A:** * **Diagram Type:** Illustrative drawing depicting a person. * **Main Elements:** A person (female figure in a dress) is shown walking. She is holding a bucket in her right hand, which is held down at her side. * **Labels and Annotations:** The letter "A" is centered below the diagram. * **Associated Text:** 提着桶在水平地面上匀速前进 (Carrying a bucket and moving forward at a constant speed on a horizontal surface) * **Option B:** * **Diagram Type:** Illustrative drawing depicting a person. * **Main Elements:** A person (male figure, an athlete) is shown in a squatting stance, holding a barbell with weights above their head with both hands. The barbell is stationary. * **Labels and Annotations:** The letter "B" is centered below the diagram. * **Associated Text:** 举着杠铃原地不动 (Holding a barbell stationary in place) * **Option C:** * **Diagram Type:** Illustrative drawing depicting a person and an object. * **Main Elements:** A person (female figure) is bending over, facing a large, irregular-shaped rock on the ground. She is using both hands to exert force on the rock, appearing to try and move it. * **Labels and Annotations:** The letter "C" is centered below the diagram. * **Associated Text:** 用力搬石头但没有搬动 (Trying to move a rock with force but failing to move it) * **Option D:** * **Diagram Type:** Illustrative drawing depicting a person and an object. * **Main Elements:** A person (male figure) is shown pushing a small, wheeled cart forward with both hands. The cart has a rectangular body and two visible wheels. The person is leaning into the push. * **Labels and Annotations:** The letter "D" is centered below the diagram. * **Associated Text:** 推着小车前进 (Pushing a small cart forward)