Let's make a face with D3.js!
A D3.js bar chart displays average treatment times across nine medical categories from a CSV file, with each bar labeled by its category. The chart is rendered as SVG, using D3 scaleBand and scaleLinear for axes, and axisBottom and axisLeft for labels. The bars are appended via selectAll, and the visualization demonstrates DOM manipulation through D3's selection and data-binding methods, though the face metaphor from the title is not implemented in the visible code.