*Vertices 2
1 "中国公共卫生" 0.0 0.0 0.0 x_fact 0.000000 y_fact 81.094527
2 "循证医学" 0.0 0.0 0.0 x_fact 4.477612 y_fact 18.905473
*Matrix 
0.000000 0.296399 
0.296399 0.000000