Based on the answers provided, here are the corrections needed for the 3D object:

1. Modify the design of the object to resemble a thermometer. This could involve making the long rectangle more tube-like and adding a bulb-like structure at one end.
2. The relative extrusion depths of the rectangle and the circle are unclear. Ensure that the rectangle is extruded slightly less than the circle to provide a clear distinction between the two parts.