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User’s two comparison vectors over eight attributes
| Attribute | Job title | Avg reply time | Price | Weekly praise rate | Medical ability | Service attitude | Quality of Q&A | Review number |
|---|---|---|---|---|---|---|---|---|
| Medical ability(best attribute) | AI | EI | WI | FI | EI | EI | WI | VI |
| Job title(worst attribute) | EI | AI | FI | VI | AI | WI | VI | WI |
