[多对一&一对一](%E5%B5%8C%E5%A5%97%E6%9F%A5%E8%AF%A2/%E5%A4%9A%E5%AF%B9%E4%B8%80%E4%B8%80%E5%AF%B9%E4%B8%80.md) [一对多](%E5%B5%8C%E5%A5%97%E6%9F%A5%E8%AF%A2/%E4%B8%80%E5%AF%B9%E5%A4%9A.md) [多对多](%E5%B5%8C%E5%A5%97%E6%9F%A5%E8%AF%A2/%E5%A4%9A%E5%AF%B9%E5%A4%9A.md) [加载策略](%E5%8A%A0%E8%BD%BD%E7%AD%96%E7%95%A5.md)