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The distributions of the bottom quark in the process $e^+ e^- \to t \,\bar{t} \to b \, W^+ \, \bar{t}$ are considered at the $e^+ e^-$ energycorresponding to the first construction stage of the Compact Linear Collider.The cross sections of $e^+ e^- \to b \ldots$, as functions of the $b$-quarkenergy and angle with respect to the direction of the electron beam, arederived and calculated. The effects of physics beyond the Standard Model areincluded via the modified $\gamma t \bar{t}$ and $Z t \bar{t}$ couplings whichnaturally appear in effective field theories. In addition to the crosssections, the energy and angular asymmetries are calculated. The dependence ofthese observables on the $e^+ e^-$ energy is calculated, and features of thisdependence are investigated.

Energy and angular distributions of the bottom quark in the electron-positron annihilation $e^+e^-\to b \, W^+ \, \bar{t}$