请问一下用bert模型时，有些微博的字段过长判断情绪时则会出现下面的报错，这种问题怎么解决呢？

[liuyyustc]

RuntimeError: The expanded size of the tensor (978) must match the existing size (512) at non-singleton dimension 1. Target sizes: [1, 978]. Tensor sizes: [1, 512]

[baizigewaaa]

RuntimeError: The expanded size of the tensor (585) must match the existing size (512) at non-singleton dimension 1. Target sizes: [100, 585]. Tensor sizes: [1, 512]我的是这个错误，请问该如何解决呢