absorption: directly aim the bucket at the water source and right click.
Disadvantages: When the water source is too large, if it is scooped in the wrong position, it will cause infinite water, so it is brain-consuming to scoop it out in turn according to the orientation.
filling: just place a square directly against the water source.
Disadvantages: It's troublesome. If you just clean up the site, you need to dismantle the blocks.