William Harwood
Explicit backpressure policies
，这一点在同城约会中也有详细论述
For Andrés Sánchez Barea, in Spain, it was the fear that arose when water started to spurt from plug sockets. For Nelson Duarte, in Portugal, it was the helplessness that hit as violent winds smacked down trees and tore tiles from roofs. For Amal Essuide, in Morocco, it was the reality that dawned when a corpse was pulled onboard a boat in the flooded medina.
Adding penalties or preferences for certain roads.